How Are Professional Laser Shows Done [closed]

What you are seeing there is the scattering of laser light off of particles in the air that the shows creators are using to allow you to see the image. They usually have some kind of smoke machine which puts a mist of particles in the air that allow the light to scatter off of it. The lasers that form the image are focused (in the sense that many lasers converge at that location, or the lasers spend more time illuminating that path, not actual optical focusing) to a particular region in space so that more scattering off of the smoke particles occurs at that physical location. This is how you end up seeing the images projected in space.Edit: As was pointed out by lemon, in the example you provided a link to, the laser show here could be projecting everything on to a screen (it seems that if it is, they are doing other things to give it the sense of projection in space, although there are certain elements that seem convincing, without viewing from another angle, its hard to tell in this video). For the effect that you are curious about though, projecting images with lasers in "mid-air", fog screens are certainly used in other instances, and create the effect that you mentioned.

1. does a laser pointer emit infrared light?

Wolfe is way off base with his answer. Laser light is coherent light, which means it has one fundamental frequency (and its harmonics). On an output vs frequency chart, we would see a flat line near zero output unitl the precise frequency of the laser is reached. Then the output would spike; only to flat line out at zero on the other side of that frequency. If that fundamental frequency falls outside the IR range, which they generally do, then there will be no IR. There all kinds of laser light frequencies...depending on the source of the light. For example, there are gas, chemical, solid, excimer, and so on types of laser source. Each has its own discrete coherent light frequency. [See source.] And each frequency has unique physical characteristics. For example, ruby rod (solid state) lasers can and do put out IR, but that's what they are meant to do...only IR. On the other hand, some chemical lasers put out blue-green light used to penetrate the ocean for surveillance. To answer your question directly, if your laser is not specifically an IR source, there is no need to filter IR because there will be no IR. Pointers, like those used during lectures to point to a screen are not IR emitters. If they were, the screens would be burned...IR is heat.

2. Can holography be done with regular photographic film? If so...?

Holograms are three-dimensional images produced by capturing a laser light interface pattern on special film. Laser light is used because it is a very pure source of one color (wavelength) of light with very orderly waves. The word hologram comes from two Greek words holos (whole) and gramma (picture). SO THATS A NO

3. What Guns for Raptor Hunting?

1. Main gun would be a light Mini gun with an ammo back pack and laser light aimining. The ammo I would use would be steel core ammo, as in armor piercing. Raptors have tough skin and you need to get to the vitals. Also they move fast and you will need to spray and pray, this is not the time for iron sights when a Raptor is bearing down on you. 2. Back up gun would be a simple no thrills handgun. I would use a Full size Glock in 357 sig. I can not afford to have some "cool" badass looking gun as my sidearm. I need something that works dirty, wet, under stress, ect, ect. Large old school Bowie knifes on both ankles, these knifes are light and could be my last ditch weapon. 3. I would also carry bear spray - pepper spray. This spray works, period. Put a cloud up of spray and that could keep them from grouping and ganging up on you. 4. Uniform would be bates steel toe 10 eye boots. Camo BDU pants bloused into boots, camo BDU top. Kevlar knee pads, Kevlar light helmet, and extreme armor level IIIA vest with inserts. I would not want to take a swipe of a claw in the chest with out something protecting me. 5. Access to a flame thrower would also be ideal because many living things are afraid of fire. And fire is a great weapon to use on them and to block there path off. Claymore mines would also help me to set up a border and secure sections of my camp site and to set up ambushes. 6. Marlboro cigarettes and lots of them, a bottle of good old coke a cola,a sonic hearing aid, and flash lights. 7. Highest priced, lightest sniper rifle in 50 Cal so that I could stay in the trees hitting as many as I could. 8. I would also need many things that go "bang!" and that are bright such as grenades, flash bangs, flares, TNT, ect ect. Because when all else fails lets go out with a large explosion in the back ground and a Glock in the other hand firing away.

GET IN TOUCH WITH US
empfohlene Artikel
Info. Wissen Nachrichten
Mouse - One of the most Important Computer Components
A computer cannot function in the way it does without its components. The different computer components like the motherboard, CPU, RAM, HDD, PSU, visual card make what computers really are. Apart from these basic components which are universal and present in every computer there are many additional components like the printer, scanner which do not play any role in the functioning of the computer. However, apart from all of these components there are three other peripheral components like keyboard, monitor and mouse which help in the running of the computer.Why Is Mouse So Important?Like all basic computer components mouse too plays an important role in the functioning of the computer. Without a mouse a person cannot afford to input data in to a computer. Though you can definitely use a computer without the help of a mouse but a mouse can largely reduce the time and effort of a person when using the computer. So a mouse can definitely make your job of working with computers easy. When buying a mouse for your computer you can choose from a variety of 3 types of mice- the ball, optical ball and the laser.Know About the Three Types of Mice The variety called ball was first created and has a rubber or metal ball inside the body of the mouse which is mechanical in nature. Though the optical variety is quiet similar to the ball mouse the former is uses optical light to detect the movement of the ball within the mouse. The optical ball mouse needs a mouse pad for proper functioning. The laser light works with the help of a laser light that detects the movements. This variety does not require a mouse pad for its functioning and is preferred over traditional varieties of mice as they can respond more quickly to actions.
Sydney Welcomes 2007
An estimated one million people have thronged to Sydney Harbor for a huge fireworks show, kicking off the start of New Year celebrations from Asia to the Americas.The celebrations came as reports of violence emerged from Thailand, with a series of coordinated explosions which ripped through the capital Bangkok killing two people and injuring more than 20.Elsewhere in the region, the Indonesian resort island of Bali had tightened security amid fears of a just such an attack over the holiday period.In Sydney, police said all vantage points around the shoreline were at or near capacity as some 3,000 kilograms (6,610 pounds) of fireworks exploded overhead in a display which centred on the city's iconic Harbour Bridge.Thousands began streaming into the city centre from early morning, with street parties erupting spontaneously well before the stroke of midnight.In New Zealand, which welcomed 2007 two hours earlier (at 1100 GMT), celebrations were hampered by unseasonably cold weather and rain.An annual outdoor New Year's Eve party in the capital Wellington was cancelled due to rain and some of the coldest summer temperatures on record.Fireworks show in Sydney (Photo: Reuters) Street celebrations were expected across the Asia-Pacific region at the end of a year when the area grew in stature on the world stage.In Hong Kong, revellers awaited the new year with a mixture of anticipation and anxiety as midnight heralded sweeping new anti-smoking laws that technically made puffing party goers liable to an on-the-spot-fine.The new law was passed earlier in the year to a chorus of disapproval from bar owners who feared it would eat into their profits.Smoking restrictions aside, hundreds of thousands of revellers descended on the downtown Lan Kwai Fong bar area and along the harbourside to watch the annual midnight fireworks display. Last year's fireworks attracted more than half a million people.Police deployed extra manpower in Lan Kwai Fong - where 23 people died in a new year scuffle in 1992 - and the Wan Chai red light district.In the Indian capital, security was tight in the run-up to 2007, and police said Sunday they had arrested two Islamic militants armed with explosives at a New Delhi railway station.Residents flocked to Connaught Place, the city's commercial centre and a hub for New Year festivities including a spectacular evening laser light show. Families thronged the white colonial-era colonnades, strolling around and eating ice cream.In China, whose growing global power marked 2006, President Hu Jintao watched the Beijing Opera to celebrate the New Year, according to state media. Nearly one thousand others joined him, including Premier Wen Jiabao.Double celebration in Muslim-majority countries Nearby Taiwan, which has been plagued by high-profile political scandals, prepared to usher in 2007 by attempting a world drum-beating record."We hope at least 8,000 people would take part in the world record-breaking event," a government official said.In Indonesia, thousands of mostly young people crowded Bay City stadium in Ancol district of Jakarta for an open air concert.Residents also gathered with traditional paper trumpets and saxophones to welcome 2007 at the main Hotel Indonesia roundabout in the city centre which is a popular site for demonstrations the rest of the year.Japan's capital Tokyo was unusually tranquil on New Year's Eve, with normally clogged roads free of heavy traffic as urban denizens returned to home towns to mark the end of a year that saw Shinzo Abe elected prime minister.In South Korea, people flocked to parks, hills and beaches to see in the New Year. Arch rival North Korea, which caused global consternation by testing a nuclear bomb in October, issued celebratory stamps, according to its state media.The New Year coincides with the Muslim festival of Eid al-Adha, creating the opportunity for a double celebration in Muslim-majority countries such as Indonesia and Pakistan.In Europe, fierce storms and strong winds could force the cancellation of some open-air celebrations in Britain over safety concerns. Tens of thousands are expected to attend a major fireworks display in London -- if it goes ahead.Across the Atlantic, a vast crowd is expected in Times Square in New York at the end of a tumultuous year for the US over the war in Iraq.AP contributed to the report
Burj Khalifa LED Show Sets Two New Records
A permanent LED lights and video installation the usage of the disguise 2x4pro has set Guinness World Records for largest and tallest LED-illuminated facade on the worlds tallest constructing.Burj Khalifa, It has formerly partnered with LED lighting fixtures and media projects agency SACO to light up the skyscrapers east faade and provide high-decision video competencies for what became the Light Up 2018 New Years celebration.The show, regarded by means of more than one million people on web site, earned a Guinness World Record for the biggest laser mild and sound show on a single constructing. For the Emaar NYE 2019 show the scope became even more ambitious. The production prolonged via to March 2019 and set two extra Guinness World Records: for the biggest LED-illuminated faade, and the tallest LED-illuminated faade. The mission required replacing the prevailing temporary device with a permanently mounted system such as the latest in LED technology, video processing and conceal pro range servers, all designed and implemented by using SACO. German-based conceal studio and rental partner bright! Studios become responsible for designing the NYE display, and the ensuing three-month extension, managing the animation work and the shows innovative direction. The SACO solution, which utilised its V-Stick inground lighting video/light fixtures has 20 instances extra decision than the previous gadget and extends genuinely the entire peak of the structure. It comprises more than 17 miles of V-Stick furnishings and boasts 1,139,one hundred forty four RGB pixels, mapped and powered via hide. SACO selected the conceal 2x4pro to power the complicated media display.Weve been running with conceal since the very starting and have evolved an interesting workflow between our companies, stated Jonathan Labbee, government vice-president and COO with SACO. SACO has also evolved a processor mapping tool, which directly uploads coordinates to the hide unit. To help bring the combination to the following level, SACO additionally collaborated with dandelion burdock who they have got labored with for numerous years. Dandelion burdock, a disguise studio companion, Underground Lighting specialises in custom conceal solutions and advanced a workflow and devised content material for the venture. Sacos integration was meticulously deliberate out, and we managed to deliver an virtually severe 29,628 vertical pixels, said Nils Porrmann, director at dandelion burdock. The size of this undertaking only turns into clean at the web page itself. With the bottom-most pixel at 210 toes from the ground even extraordinarily long photographic lenses would best supply us a moderate decision to debug the installation and affirm every pixel. It has been a incredible honour for our studio to paintings on the creative workflow of the tallest building on earth, and we have unspeakable admire for the set up crew we worked with. To cope with the massive-scale nature of the challenge SACO wished to maximise the video processor raster and make sure that the display control aspect become designed around the SACO and disguise systems. The functions and functions of conceal that were particularly helpful had been its three-D mapping device and live enter capability.The capability of the software and hardware to manipulate very big video documents become very beneficial too. Six custom multimedia shows were created by SACO Media Collective as a part of the Burj Khalifa each day content. It became vital that the visible content material associated with the building and its architecture, impressing visitors via offering visible effects to trick the eye and allow the architecture to take on a 2nd skin. Whether with colours, lights results or three-D deformation, the content material become never flat to the floor and used the buildings curves and depth as its canvas. For the real content material manufacturing pipeline, two different templates were created in Adobe After Effects to allow content to suit perfectly our system specifications, SACOs technology and the constructing.Even although the building is absolutely tall and the accurate pixel count become enormous, the templates have been easy to apply and helped create any type of content very efficiently. A easy three-D model became extensively utilized for three-D and architectural results and animation. The templates have been not handiest created for the teams use but additionally to provide the technical specs and suggestions for any content creation for Burj Khalifas new screen.Lighting fixtures suppliers in qatar | LED lighting companies in qatar | Lighting solutions qatar | Lighting suppliers in qatar | LED lights shops in qatar RELATED QUESTION What are the best Christmas laser lights? Things to Remember Before Buying Christmas Laser Lights Chassis Material Waterproofing Laser Colors Laser Patterns Remote Operation Indoor / Outdoor Chassis Material Is the laser projector made out of metal or plastic? It should go without saying that metal lasts longer than plastic. Depending on the type of weather that is frequented in your area, one or the other might suit you more appropriately. In places with severe weather, metal would probably be the best choice; however, in places with very moderate weather, plastic will do just fine and probably save you a little money. Waterproofing Is the projector waterproof? Some projectors are waterproof while others arent. If you plan on using one outside, youll definitely want to have that extra protection from the rain and snow. On the other hand, if you are only going to use one for inside purposes, you might not need it to be weather resistant. Laser Colors What colors will the projector display? There are two standard color combinations that are found on most laser projectors. Usually, those designed solely for Christmas contain red and green lights. Others that are used for Christmas, as well as other holidays or parties, contain red, green, and blue (RGB). Depending on whether you only want lights for Christmas or need a multipurpose unit, you might find one product more appealing than the other. Laser Patterns What kinds of patterns does the projector show? Patterns are at the core of what laser lights are all about. Some projectors give you the option to select exactly which colors you want to display and how the colors move and morph. Others do not give you these options and have a set way that they operate. Youll have to decide whether you want to pay the price for more control over your patterns or settle for what is given to you. Remote Operation Does it include a remote? Many, but not all, laser projectors come with a remote controller that allows you to control the projectors functions from a distance. Some controllers have a range of just a few meters while others can reach a very, very long distance. And, again, some projectors dont come with a remote at all. If convenience is what you seek, this is a factor that will definitely play into your decision-making. Indoor / Outdoor Can I use it indoors or outdoors? Laser projectors are usually made to be used indoors, outdoors, or both. You wouldnt want to buy an indoor laser projector and place it outside just to have it ruined by the weather. For example, those made solely for indoor use are usually not waterproof while those designed for the outdoors are; rain and snow would damage a unit only made for the indoors. In addition, indoor projectors usually have a shorter projection range than outdoor ones. An indoor unit used outside might not turn out to be as bright as you would like. And, you might think that using an outdoor projector indoors would be super bright and suffer no problems; however, those designed only for the outdoors usually do not come with an optional indoor base to allow it to stand by itself on a flat surface. These are some key details youll want to know. Personally, though, I prefer to use the slightly more traditional LED string lights for all my decorating needs. Ill go out of my way and buy new stuff such as laser lights from time to time, but Ill most likely be using string lights for every main decorating event.
Is It Possible to Directly Pump a Laser Using Sunlight?
They already exist. "Solar-pumped lasers already exist: they work by concentrating sunlight onto crystalline materials such as neodymium-doped yttrium aluminium garnet, causing them to emit laser light." (source) They have been innovated though, so there are more efficient method to make solar-powered lasers now.1. scientifically, why can't you see laser beams?Light, including laser light, moves in straight lines. When the sun shines through a small gap between the curtains in a darkened room, you can only "see" the path of the light if it is scattered by minute particles, such as dust or smoke, in the air. The same applies to lasers. When setting up experiments using lasers with mirrors or lenses, smoke is usually introduced deliberately to enable the beam path to be set up properly.2. how is a hologram formed?Holograms are formed by shining laser light through a 3D object. Unlike a photograph, not only is intensity of light recorded, but it's amplitude and phase. When the appropriate light is shone onto the hologram, it diffracts some of the light until it is exactly the same as the light wave that came from the original object. This is what causes the object to appear 3D. Early holograms were only able to be viewed when laser light was shone onto them, but more recent ones can be viewed by white light. The reason many holograms are on a reflective background is so that light is reflected through the image, allowing us to view the hologram.3. How are the properties of laser light used in laser eye surgery?LASIK eye surgery is the latest, most talked about form of laser eye surgery. It uses an excimer laser that performs the actual operation of reshaping the cornea to restore proper vision. This type of laser has the ability to vaporize selected portions of the cornea without generating heat. The surgeon makes a small incision on the outer layer of the cornea to produce a flap. This flap is folded back out of the way while the laser makes the necessary corrections to the underlying portion of the cornea. Upon completion of the laser processing, the corneal flap is repositioned, restoring proper vision almost immediately. The entire process takes only a few minutes, it's virtually painless, and it works wonders!4. what is the speed of red laser light though air?The speed in air is about 0.029% less than in vacuum, or about 299,700,000. m/s This is true for visible light, including red. Other parts of the spectrum, such as infrared and ultraviolet, have different speeds.5. what is laser light?It's what Captain Kirk shot out of his Phaser on Star Trek. It can kill a Klingon6. Laser light show brightens up Aloha StadiumHONOLULU (KHON2) - There is much anticipation for the cool, new experience at Aloha Stadium. Cabin Fever presents its Drive-In Laser Light Show for three weeks starting Thursday, April 8. The three-week performance features a light display and music from the 80s, 90s and current era from the genres of pop to classic rock. Those who purchase tickets can enjoy the music - accompanied by a light show - from the safety and comfort of their own vehicle. The laser lights are synchronized to create graphic effects. The first show was initially planned for 7 p.m. Thursday but was pushed back to 7:30 p.m. due to longer sunlight hours as Hawaii approaches the summer months. Guests will have three weeks to see the performance; Thursday, April 8, through Sunday, April 11, Thursday, April 15, through Sunday, April 18, and Thursday, April 22, through Sunday, April 25. There will be two shows each night, one at 7 p.m. and one at 9 p.m. The categories for purchased tickets are front row, VIP and general. Click here for more information and ticket prices.7. Where can you buy this battery for a laser light?if you can not find it at wal-mart, then i have no idea8. Will laser (or light pulse) hair removal affect my tattoos?I DOUBT THAT!!!9. Cat Laser Light Toy & No Buttons?haha i wonder the exact same thing myself - it sounds stupid but the button really does make your finger sore!10. Is it possible to construct a quantum "computer” using laser light similar to the double-slit experiment?Yes it can be done using two double slits. Place the first slit in front of the laser the second slit beyond the first and off set so that only 1 slit is illuminated by the interference pattern created by the first double slit. This will give you an AND GATE on the output. If you cover one of the slits in the first double slit the out put from the second double slit will be an interference pattern instead of just a single line of light. This idea was patented in the 1970's and it has the limitation of no gain so it does not make an effective optical transistor. It is also large in comparison to electrical transistors. This is not quantum computing though.
A Comparison Between Laser Wire and LED Lighting Strips
Ellumiglow, based out of Portland, Oregon, provides custom lighting solutions for professionals, retailers, design agencies, television and film, and textile manufacturers, just to name a few.A common question we often hear is "How bright are light emitting diodes vs... product X or Y". Today, we're going to compare the primary differences between one of our newest accent lighting technologies, Laser Wire to see how it stacks up against the common LED Strip light. Let's take a closer look!EFFICIENCYIf comparing a one meter length of our standard 5050 RGBW Strip Lighting with one meter length of Super Pop Laser Wire, illuminating the RED channel on the strip light at full brightness consumes 600 mA (milli amps) at 24 volts DC, while a red laser module only consumes around 100mA at 5V DC. When converting these numbers to watts, the LEDs consumes over 25x more power than the same length of the laser light cabling. (14.4 vs 0.5 watts) For both of these, producing the color red is the more efficient than emitting blue and green light.LIFESPANA 5VDC USB laser module has a MTBF (mean time before failure) of 8,000 hours. LED strip lighting has a rated lifespan of up to 50,000 hours. Longer lifespan out of both is possible if brightness is reduced.COST (and replacement cost)Based on a length of 5 meters, a reel of **high-quality single color, RGBW, or RGB LED strip lighting without any driving electronics or controllers can cost anywhere between $99 and $249 USD. A five meter Laser system in red, green, or blue costs $129, and works right out of the box with most standard USB batteries or power sources.If an LED Strip is damaged during normal operation or extended use, sometimes it is repairable but at the risk of reducing structural integrity of the copper PCB strip or having inconsistent light quality between the original diodes on the strip and the new section that is patched in. This can be especially difficult when the LED strip lights are installed in a inaccessible area, and requires expert soldering experience to be done correctly. It's usually cheaper to replace the entire strip in effort to prevent future issues and also save labor cost in replacement and repair.If the laser emitting device is damaged during use or a new replacement color, the USB laser emitter module can be easily replaced for easy serviceability, reducing downtime and labor costs. Cost of a replacement, single color 5VDC 20mW laser emitter retails for $84.99 USD. Other modules with higher output power are available.APPLICATIONBoth of the lighting technologies have some overlap, but also have very distinct differences that make each one unique and suited to certain uses. LED strips are great for filling a room with light, and fare well as an alternative to older types of point light sources, such as CFL bulbs, fluorescent tubes, and incandescent lighting. In many instances, a diffuser is paired with LED's to eliminate hot-spots and produce an even glow. Without a diffuser, users experience what is called "hot-spotting" (due to many individual diodes lined up in a row to produce an appearance of continuous lighting from small, bright points of light). Light emitting strips can be used outdoors and indoors, but it does require a special jacketing to protect the lighting element from weather. Ellumiglow's Laser Wire is 0.9mm thin, and provides 360 degrees of illumination around the circumference of the wire. It's thin, flexible nature allows it to be hidden or contoured on almost any surface due to it's almost-invisible appearance when off. The illuminating cable itself is also waterproof in nature, so it does not require any additional materials to achieve an IP67 rating.CUSTOM COLORS and GradientsLED based strip lighting is available in single colors and RGB, RGBW, and even color-temperature adjustable strip lighting (consisting of a pure white and warm white diode). Color mixing can be achieved with our line of Auralux and Wavelux premium LED controller, via DMX, Wifi, Dali, 0-10v dimming, and other control methods. Gradients are possible by using individually addressable pixel strips (which also require special controllers to operate)To achieve color mixing with a laser-based light source, either two lasers of different colors can be placed on the end of a single Laser Wire cable to achieve color mixing and gradients, or an RGB laser driver may be used to achieve full-gamut color mixing (including tunable whites). TTL 12v/5v laser modules allow the light to be controlled via PWM via microcontroller platforms, and also makes it compatible with many of the same control methods mentioned above.BRIGHTNESSLED based light strips can vary in brightness output due to a number of factors, but generally when compared directly with the laser-based counterpart it is brighter. We would put them both in categories of LED light as "being able to provide practical light to fill a room", while laser based cabling to "produce a bright appearance appropriate to accent contours and edges".FLEXIBILITY and DURABILITYBoth of the products mentioned in this article have been generally pegged as being flexible, making them great for contouring curves and mounting to surfaces that aren't predictable and flat. RGB and White based strip lighting uses a flexible copper tape that is only capable of bending in a lateral direction, and are not designed to hold up to continuous flexing. Laser Wire can be bent up to a 5mm radius before light leakage and potential damage occurs, and otherwise is infinitely bendable and is non-shape conforming with the consistency of a "wet noodle". The mechanical pull force of the light carrier has been tested up to 100kpsi.**Pricing references pulled from LED strip lighting available from Ellumiglow.com - our strips feature CRI over 95, pixel bin matching during manufacturing process for accurate color reproduction, unique color mixing features utilizing 5 meters of RGBW and RGBA (amber) 4 in 1 5050 type pixels for $219.99 USD. A 5 meter reel of 3535 RGB led strips produce up to 3.5 times the light output of other RGB and RGBW strips, and retails for $219.99 USD. A 5 meter reel of Auralux RGBW individually addressable LED pixels retails for $249.99 USD. ECO RGB Pixel Free uses smaller RGB pixels and a thinner conductive tape inside of a dual-chamber silicone diffusion along a 5 meter length, and retails for $99.99 USD (in comparison to the standard non-economy version retailing for $179.99 USD).·RELATED QUESTIONWhat are the best Christmas laser lights?Things to Remember Before Buying Christmas Laser LightsChassis MaterialWaterproofingLaser ColorsLaser PatternsRemote OperationIndoor / OutdoorChassis Material - Is the laser projector made out of metal or plastic? It should go without saying that metal lasts longer than plastic. Depending on the type of weather that is frequented in your area, one or the other might suit you more appropriately. In places with severe weather, metal would probably be the best choice; however, in places with very moderate weather, plastic will do just fine and probably save you a little money.Waterproofing - Is the projector waterproof? Some projectors are waterproof while others aren't. If you plan on using one outside, you'll definitely want to have that extra protection from the rain and snow. On the other hand, if you are only going to use one for inside purposes, you might not need it to be weather resistant.Laser Colors - What colors will the projector display? There are two standard color combinations that are found on most laser projectors. Usually, those designed solely for Christmas contain red and green lights. Others that are used for Christmas, as well as other holidays or parties, contain red, green, and blue (RGB). Depending on whether you only want lights for Christmas or need a multipurpose unit, you might find one product more appealing than the other.Laser Patterns - What kinds of patterns does the projector show? Patterns are at the core of what laser lights are all about. Some projectors give you the option to select exactly which colors you want to display and how the colors move and morph. Others do not give you these options and have a set way that they operate. You'll have to decide whether you want to pay the price for more control over your patterns or settle for what is given to you.Remote Operation - Does it include a remote? Many, but not all, laser projectors come with a remote controller that allows you to control the projector's functions from a distance. Some controllers have a range of just a few meters while others can reach a very, very long distance. And, again, some projectors don't come with a remote at all. If convenience is what you seek, this is a factor that will definitely play into your decision-making.Indoor / Outdoor - Can I use it indoors or outdoors? Laser projectors are usually made to be used indoors, outdoors, or both. You wouldn't want to buy an indoor laser projector and place it outside just to have it ruined by the weather. For example, those made solely for indoor use are usually not waterproof while those designed for the outdoors are; rain and snow would damage a unit only made for the indoors. In addition, indoor projectors usually have a shorter projection range than outdoor ones. An indoor unit used outside might not turn out to be as bright as you would like. And, you might think that using an outdoor projector indoors would be super bright and suffer no problems; however, those designed only for the outdoors usually do not come with an optional indoor base to allow it to stand by itself on a flat surface. These are some key details you'll want to know.Personally, though, I prefer to use the slightly more traditional LED string lightsfor all my decorating needs. I'll go out of my way and buy new stuff such as laser lights from time to time, but I'll most likely be using string lights for every main decorating event.
Ask Ethan: Can a Laser Really Rip Apart Empty Space?
Empty space, as it turns out, isn't so empty. The fluctuations in the vacuum of space itself mean that even if you take all the matter and radiation out of a region of space, there's still a finite amount of energy there, inherent to space itself. If you fire a powerful enough laser at it, can you, as a Science magazine story called it, break the vacuum and rip apart empty space? That's what our Patreon supporter Malcolm Schongalla wants to know, as he asks:The story is real, verified, and a little bit exaggerated in terms of claims that it can break the vacuum, as though such a thing were possible. Let's dive into the real science to find out what's really happening.The very idea of a laser itself is still relatively novel, despite how widespread they are. Originally an acronym standing for Light Amplification by Stimulated Emission of Radiation, lasers are a bit of a misnomer. In truth, nothing is really being amplified. You know that, in normal matter, you have an atomic nucleus and various energy levels for an electron; in molecules, crystals, and other bound structures, the particular separations between an electron's energy levels dictate which transitions are allow. In a laser, the electronsoscillatebetween two allowable states, emitting a photon of a very particular energy when they drop from the higher-energy state to the lower one. These oscillations are what produce the light, but for some reason, no one wanted the acronym Light Oscillation by Stimulated Emission of Radiation.If you can produce either multiple atoms-or-molecules in the same excited state and stimulate their spontaneous jump to the ground state, they'll emit the same energy photon. These transitions are extremely fast (but not infinitely so), and so there is a theoretical limit to how quickly you can make a single atom-or-molecule hop up to the excited state and spontaneously emit a photon.Normally, some type of gas, molecular compound or crystal is used inside a resonant-or-reflective cavity to create a laser, but you can also make one out of free electrons, semiconductors, optical fibers, and, in theory, even positronium.The amount of energy that comes out of a laser is limited by the amount you put in, so the only way to achieve extremely high power in your laser is to shorten the timescale of the emitted laser pulse. You might hear the term petawatt, which is 10 15 W, and think this is a tremendous amount of energy. But "petawatts" aren't energy, but power, which is an energy over a time. A petawatt laser could either be a laser that emits 10 15 J of energy (the amount released by about 200 kilotons of TNT) every second, or could just be a laser that emits one joule of energy (the amount released by burning 60 micrograms of sugar) over femtosecond (10 -15 second) timescales. In terms of energy, these two scenarios are vastly different, even though their power is the same.The 100 petawatt laser in question hasn't been built yet, but is rather the next enormous threshold that researchers plan to cross in the 2020s. The hypothesized project is known as theStation of Extreme Light, and is set to be constructed at theShanghai Superintense Ultrafast Laser Facility in China.An external pump, which is usually light from a different wavelength, excites the electrons in the lasing material, causing the characteristic transition that creates the laser light. The photons then all emege in a tightly packed stream, or a pulse, at a very narrow set of wavelengths. To the surprise of many, the 1 petawatt threshold was crossed way back in 1996; it's taken nearly two decades to cross the 10 petawatt mark.The National Ignition Facility in the United States may be what we first think of when we envision high-powered lasers, but this is a bit of a red herring. This array of 192 lasers, focusing on a single point to compress a hydrogen pellet and ignite nuclear fusion, hovers right around the 1 PW mark, but isn't the most powerful one around. It has a high amount of energy at over a million joules, but its pulses are, comparatively, very long-duration. To set the power record, you need to deliver the greatest amount of energy in the shortest amount of time.The current record-holder, instead, uses a sapphire crystal doped with titanium, pumps hundreds of joules of energy into it, bounces the light back-and-forth until destructive interference cancels out most of the pulse length, and the output is compressed into a single pulse just tens of femtoseconds long. That's how we can reach output powers in the ballpark of 10 PW.In order to go higher- to reach that next order-of-magnitude milestone- we'll have to either increase the energy we input into the laser, from hundreds of joules to thousands, or decrease the pulse time. The first one is problematic for the materials we presently use. Small titanium-sapphire crystals won't hold up to that kind of energy, while larger ones tend to emit light in the wrong direction: at right angles to the desired pathway. The three main approaches, therefore, that researchers are considering at the present time are:The pulses must then be brought to a tight focus, raising not just the power, but the intensity, or the power concentrated at a single point. As the Science article states This opens the door to a long-sought-after opportunity to create particle-antiparticle pairs where there were none before, but it's hardly "breaking the quantum vacuum." According to the theory of quantum electrodynamics, the zero-point energy of empty space isn't zero, but some positive, finite value. Although we visualize it as particles and antiparticles popping in-and-out of existence, a better depiction is to recognize that, with enough energy, you can- through physics- use these electromagnetic properties of empty space to generate real particle/antiparticle pairs . This is based on the simple Einsteinian physics of E = mc , but requires a strong enough electric field to build those particles: around 10 16 volts per meter. Light, since it's an electromagnetic wave, carries with it both electric and magnetic fields, and will reach that critical threshold with a laser intensity of 10 29 W/cm You ought to notice, right away, that even the dream scenario of the science article gives intensities that are still 100,000 times too small to reach this threshold, and whenever you're below that threshold, your ability to produce particle/antiparticle pairs is exponentially suppressed. The mechanism at play is quite different than simply the reverse of pair production, where instead of an electron and positron annihilating to create two photons, two photons interact to produce an electron/positron pair. (That process was first experimentally demonstrated way back in 1997 .) In the laser setup, no individual photons have enough energy to produce new particles, but rather their combined effects on the vacuum of space causes particle/antiparticle pairs to pop into existence with a particular probability. Unless, however, those intensities approach that critical 10 29 W/cm threshold, that probability might as well be zero.The ability to generate matter/antimatter pairs of particles from empty space alone will be an important test of quantum electrodynamics, and will also be a remarkable demonstration of the power of lasers and our ability to control them. It may not take reaching that critical threshold to generate the first particle/antiparticle pairs from this mechanism, but you'll have to either get close, get lucky, or have some sort of mechanism to enhance your production over what you naively expect. In any case, the quantum vacuum never breaks, but rather does exactly what you expect of it: responds to matter and energy in accordance with the laws of physics. It might not be intuitive, but it's something even more powerful: it's predictable. The art of doing that prediction and doing the experiments to verify or refute them is what science is all about! We may not be there yet, but every leap upwards in power and intensity is another step closer to this "holy grail" in laser physics.
The Aliens Are at It Again How Do You Defend Against the Moon Getting Deorbited?
A great article by xkcd on this very topicThe Department of Defense has developed megawatt lasers, designed for destroying incoming missiles in mid-flight.The Boeing YAL-1 was a megawatt-class chemical oxygen iodine laser mounted in a 747. It was an infrared laser, so it was not directly visible, but we can imagine building a visible-light laser with similar power. Let's give one to everyone.We are hitting the Moon with 7 billion MegaWatts of power (that's $7 times 10^15$ W).It matches the brightness of the Sun but does not accomplish any deorbiting.Ok, let's mount a megawatt laser on every square meter of the surface of Asia. Powering this array of 50 trillion lasers would use up Earth's oil reserves in approximately two minutes, but for those two minutes, the Moon would look like this:The Moon shines as brightly as the midmorning sun, and by the end of the two minutes, the lunar regolith is heated to a glow.We are hitting it with $50 cdot 10^12 times 1 cdot 10^6 = 50 cdot 10^18 W$ of laser light but it does not deorbit the Moon.The most powerful laser on Earth is the confinement beam at the National Ignition Facility, a fusion research laboratory. It's an ultraviolet laser with an output of 500 terawatts. However, it only fires in single pulses lasting a few nanoseconds, so the total energy delivered is about equivalent to a quarter-cup of gasoline.Let's imagine we somehow found a way to power and fire it continuously, gave one to everyone, and pointed them all at the Moon. Unfortunately, the laser energy flow would turn the atmosphere to plasma, instantly igniting the Earth's surface and killing us all.But let's assume that the lasers somehow pass through the atmosphere without interacting.Under those circumstances, it turns out Earth still catches fire. The reflected light from the Moon would be four thousand times brighter than the noonday sun. Moonlight would become bright enough to boil away Earth's oceans in less than a year.But forget the Earth-what would happen to the Moon?The laser itself would exert enough radiation pressure to accelerate the Moon at about one ten millionth of a gee. This acceleration would not be noticeable in the short term, but over the years, it adds up to enough to push it free from Earth orbit.... If radiation pressure were the only force involved.40 megajoules of energy is enough to vaporize a kilogram of rock. [and the beams turn it into a super hot plasma]This flow of material effectively turns the entire surface of the Moon into a rocket engine-and a surprisingly efficient one, too. Using lasers to blast off surface material like this is called laser ablation, and it turns out to be a promising method for spacecraft propulsion.[...] it will take a few months for the Moon to be pushed out of range of our laser. It will keep most of its mass, but escape Earth's gravity and enter a lopsided orbit around the sun.Hitting the Moon with $ 500 cdot 10^12 times 7 cdot 10^9 = 3.5 cdot 10^24 W$ of power would do the job.Although xkcd is discussing pushing the Moon away, the numbers are similar for deorbitting it.No one is going to be deorbiting the Moon using weapons fire.1. Can you make laser light work in daylight outside?It works just fine in daylight. Its relatively faint light is lost in the background light though. Sort of like whisper at a football game2. Guys, does a LASER LIGHT gets reflected by a mirror....?shine one into a mirror and you will know3. Why dispersion control necessary in optical fiber communication?Because an uncompensated optical fiber will cause high frequency pulses of laser light to distort the longer the distance, meaning the detector might not be able to tell the difference between a real pulse and an artifact pulse4. My dog is still looking for the laser light?yes all cats and dogs do that5. will a 150 mw green laser light gun powder?I would not really bet on it. I think there exist 300Mw lasers that can light matches that you can order via internet6. Handheld laser light and looking at it by accident?445 nm is fantastically a lot violet, regularly i would say 450 is the reduce for blue and some thing from 380 to 449 is violet. should be close to to blue nonetheless. i will not quite propose you about some thing as i do not recognize why you are starting to be a laser
Does a Cat Playing with a Laser Light Cause It Any Physcological Damage?
This is a good question. Many people believe it does cause damage because they can never catch it, it has no scent, and it disappears and reappears seemingly by magic. I err on the side of safety and do not use these type of item as a toy. Cats *love* interactive toys, meaning they *know* that *you* are on the other end of the activity. Pole toys are great for this and it causes them to bond with you, as opposed to the light toys, which they normally do not associate with you. Good question!1. broken laser light on sliding miter saw?Go in to your local Sear store or call them. They should have the correct information to the correct Craftsman model. Sears is still good people2. Following his claim that he is a u201cvery stable geniusu201d, if Trump tells us that he also invented the laser and the light bulb, would that have any meaningful political consequence?Trump has proven that he could say literally any jackass thing and people would still support him. Part of the reason his base loves him so much is that they find his idiotic lies amusing, and the frustration those lies cause even more so. When Trump lies, it is a bit like giving the middle finger to their perceived enemies. I can't claim to understand what it is about truth and reason that they find so bitterly offensive, but there you have it.Trump's lies about voter fraud, deep state conspiracies, and Obama's heritage have caused far more damage our country. Claiming to have invented this or that doodad is really trivial by comparison.3. Convert normal white light to laser-like light?Photons generated by a laser are coherent. In other words, they have the same wavelength (energy), and polarization and phase.By filtering unwanted photons, you could create light with a narrow spectrum and the same polarization, However, you would have plenty of different phase contributions. Lasers work like copy machines for photons, based on stimulated emission, which is due to quantum mechanics. Therefore, this is nothing, you could replace with a non-quantum device.The user The Photon is right, you could optically pump a laser medium, which then in turn would produce laser light.4. How close can magnets get to CD's without ruining them?As close as you like to CDs and DVDs. These use reflection or non-reflection of laser light, not magnetic effects. The only devices you are likely to have that could be affected by magnets are credit cards, cash cards and the like which have a magnetic strip, floppy disks which are magnetic, VHS and cassette tapes and mechanical watches like Rolexes;some of their moving parts are made of magnetic material. Integrated circuit electronics wo not be affected by a magnetic field. People with pacemakers need to worry about MRI scans because the magnets in these machines are much more powerful than the magnets you've got. Oh yeah cathode ray tube colour TVs behave funny when you bring a magnet up to the screen, but they come right after a few hours5. laser light travels in a vacuum at 3.00 x 10^8 m/s...? WHAT FORMULA?You advise to let us know which you are able to not do an uncomplicated math concern like this! The sunlight is ninety 3 million miles from earth, and lightweight travels at one hundred and ninety 3 million miles in line with 2d. in basic terms use uncomplicated branch to get the respond. it somewhat is a shame that there are human beings on the internet which could not do basic math issues. the respond is, it takes the mild from the sunlight to be triumphant in the earth 480 seconds, you employ math to be sure what proportion minutes are in 480seconds6. How is temperature related to color?Let me recommend the Wikipedia article on colour temperature but caution you that while that article is quite good, it says a few misleading things and, as usual, you might want to visit a library or do some more extensive online research. If you want to learn the math of how color and temperature are correlated in thermal radiation, look at the excellent article on Wien's displacement law. (Spoiler: it's peak wavelength of light = a constant / temperature or peak frequency of light = a different but related constant * temperature)1) If one object is appearing blue and other object red. That does not always mean blue object is hotter than red? Is that correct?That is precisely correct. In fact, most colors we see around us in the normal course of life are not correlated with temperature in this way. Physicists have found that the spectrum of radiation emitted by an object is correlated with the temperature of the object. If the object is hot enough, it emits visible light. The color temperature we are talking about here is temperature at which a perfect (black) radiator would emit radiation of the same average frequency.If yes then how is it so? Most of the light we actually see around us is non-thermal; its color derives from differences in the properties of various materials. For example, the air molecules over our heads scatter blue light about eight times more readily than red light, so we see a strong blue color. To get light from a purely thermal source that was in some average sense "equally blue", you would have to heat that source to about four times the temperature of our Sun's photosphere. The only thermal sources you see in everyday life are things like toaster wires or oven heating coils that get red-hot, the Sun and the fixed stars, and incandescent lights. Anything you see by reflected light (including the planets and the Moon as well as most anything you see on Earth that is not red hot or hotter), or scattered light (like the blue sky), or various kinds of non-thermal emission (lasers, LEDs, fluorescents, lightning). Even open flames - candlelight and firelight - are not thermal, a candle is no where near the thousands of degrees its color would seem to indicate; if you want to see how thermal colors work a good way is to watch glass blowers at work and look through the little window into their furnace.If you use infrared cameras or goggles, you can see a representation of the thermal radiation from objects like people or trees or the warm exhaust from a vehicle. Look up "thermal imaging" in a search engine or a Library and you will find some pictures that show warm things as bright and cooler things darker. Remember the colors you see in such images are "false", you can not see those colors with your eyes, though you can feel them on your skin and some animals, like pit vipers, can "see" them directly with sense organs adapted to infrared light.Note: Confusingly, when people talk about "color temperature" they can mean several different things, especially:the correlated color temperature (CCT)- that is, the temperature a blackbody (perfect thermal radiator) would need to be heated to to emit light of the same average color.Some kind of "perceived color temperature" that varies depending on who is doing the color/temperature mapping. Usually this seems to run backwards from the CCT, so that red and orange are "hot" colors and blue, purple, and green are called "cool" colors, but it need not be a simple backwards map; for example, red might be called 'warm', and orange "hot", then green is "cool", and blue "cold". There is no universal list of how people rank colors psychologically or artistically in terms of temperature, in fact according to visual designers there are "warm greys" and "cool greys" that would all not even fit on the CCT scale. This means that if you are reading a book and it talks about hot or cool colors, you may have no real way of knowing what kind of color it means unless you pick it up from context in that particular book.Also, people see color very differently from a simple spectrum analyzer; our vision is highly background and history dependent. The very same frequency that appears yellow to us in one context might seem green or orange in another context: read up on "color perception" as a topic to learn more about this.The sky appears blue, does that mean its hot? No, your doubts here are well justified. Blue sky is not a thermal light source. In fact, assigning it a thermal temperature is a little disingenuous as there is another way to measure "the temperature of the sky" with a telescope that gives a much more sensible answer. (you point telescope at a patch of sky and put a sort of thermometer at the focus - I assure you, you do not get 27,000 degrees for a patch of blue sky this way, but you do get the right sort of temperature for the Sun.) It would have been better to just say "If you measure the light intensity vs. frequency profile for light from this patch of blue sky, the peak intensity is blah blah, which happens to be the same as the peak frequency of the light emitted by purely thermal radiation from a star whose surface is at 25,000 degrees C, is not that interesting?" Or some such construct.Note that light really does have a measurable temperature in yet another way that depends on both the average frequency of the light and on how 'thermalized' the light is. In this sense, light from thermal sources like the Sun or a furnace has just the kind of temperature you read about before asking the question, but light from other sources is generally "cooler". Fluorescent light would be "cool" and laser light "extremely cold". This sense is actually the most consistent and useful way I know of to talk about light and temperature, but few people seem to use it outside of people who actually use or study atomic physics or laser physics. I believe it is likely to become more popular in the future and then people will much less often be saying confusing and silly things about the temperature of the blue sky and so on.
Has Anyone Tried Inventing a Laser Light That Could Be Used to Shine on the Graffiti and Fade It in
you could have a Phosphorescence paint that reacts to a certain bandwidth of light then get a laser in that spectrum and you would be set. you might even be able to get several different Phosphorescence agents in the paint and use 2 or more lasers to produce multiple output colors.1. Following his claim that he is a u201cvery stable geniusu201d, if Trump tells us that he also invented the laser and the light bulb, would that have any meaningful political consequence?Yes. There would be people who would definitely believe him. Those people would have an even better reason to vote for him next time. Sadly there are Americans whom Trump is smarter than.2. I red laser light ok for cat to play with?I have a cat, and I do the same thing, as long as you do not directly point it in his eyeball for like 10 seconds your fine, just make sure it's not there for a long time or it could possibly blind him, if it's a high powered laser3. Can laser light (i.e. laser pointer) pass unchanged through fiber optics?any light that passes through different medium will deflect its direction even in a small amount4. Is the purple plasma light inside a CO2 laser tube before exiting the lens harmful to look at?Hi..I used to work with laser applications...I can say with certainty, any kind of laser light isn't good to look at...what is there to see?The Laser is a good thing to have in communications, and seem to work well in the medical field. Lasers are used, general construction use, roads, homes, etc..I don't believe lasers are designed to be looked at as your question may suggest. The optic eye is designed with limitations of how much light is too much light for you to see correctly..kinda why we wear sunglasses...Happy HolidaysDaveIs the purple plasma light inside a CO2 laser tube before exiting the lens harmful to look at?5. Can we obtain a laser light amplification in the absence of a stimulation emission?The following three posts should together provide a quick introduction to how lasers work.Thomas Yee's answer to What is population inversion, and explain stimulated emission?Thomas Yee's answer to What is the laser used for today? What is an explanation of Einstein's theory of radiation?Robert MacCloud's answer to Why are two-level lasers not possible while three levels are necessary?6. Gamo Varmint Hunter 1200 fps .177 cal Tactical Air Rifle w/Scope, Laser, & Light?rws 34 is a better quality gun! benjamin 397 or 392 are american made and very accurate out of the box and built for a lifetime of service! mac1airgun.com or adventuresinairgunhunting.com are good honest dealers that know there airguns! jmho!7. Is it true that red lasers from laser pointers or even mouse/mice that use red laser light can make U go blind?The lasers can damage your eyes. Only for extended periods of time will serious damage occur. So as long as you are not blatantly stupid, you are good8. Building a real lightsaber...?i always thought that if you had a mirror fixed on the end of a rod, several lazer beams could hit the mirriors, reflect back, hit another set of mirrors, and so on... untill it created a small field of laser light. but that would not allow you to use the tip.9. laser light is extremely useful because?U can shoot a large laser at the moon with a beer company logo on it =D10. The aliens are at it again … how do you defend against the Moon getting deorbited?A great article by xkcd on this very topicThe Department of Defense has developed megawatt lasers, designed for destroying incoming missiles in mid-flight.The Boeing YAL-1 was a megawatt-class chemical oxygen iodine laser mounted in a 747. It was an infrared laser, so it was not directly visible, but we can imagine building a visible-light laser with similar power. Let's give one to everyone.We are hitting the Moon with 7 billion MegaWatts of power (that's $7 times 10^15$ W).It matches the brightness of the Sun but does not accomplish any deorbiting.Ok, let's mount a megawatt laser on every square meter of the surface of Asia. Powering this array of 50 trillion lasers would use up Earth's oil reserves in approximately two minutes, but for those two minutes, the Moon would look like this:The Moon shines as brightly as the midmorning sun, and by the end of the two minutes, the lunar regolith is heated to a glow.We are hitting it with $50 cdot 10^12 times 1 cdot 10^6 = 50 cdot 10^18 W$ of laser light but it does not deorbit the Moon.The most powerful laser on Earth is the confinement beam at the National Ignition Facility, a fusion research laboratory. It's an ultraviolet laser with an output of 500 terawatts. However, it only fires in single pulses lasting a few nanoseconds, so the total energy delivered is about equivalent to a quarter-cup of gasoline.Let's imagine we somehow found a way to power and fire it continuously, gave one to everyone, and pointed them all at the Moon. Unfortunately, the laser energy flow would turn the atmosphere to plasma, instantly igniting the Earth's surface and killing us all.But let's assume that the lasers somehow pass through the atmosphere without interacting.Under those circumstances, it turns out Earth still catches fire. The reflected light from the Moon would be four thousand times brighter than the noonday sun. Moonlight would become bright enough to boil away Earth's oceans in less than a year.But forget the Earth-what would happen to the Moon?The laser itself would exert enough radiation pressure to accelerate the Moon at about one ten millionth of a gee. This acceleration would not be noticeable in the short term, but over the years, it adds up to enough to push it free from Earth orbit.... If radiation pressure were the only force involved.40 megajoules of energy is enough to vaporize a kilogram of rock. [and the beams turn it into a super hot plasma]This flow of material effectively turns the entire surface of the Moon into a rocket engine-and a surprisingly efficient one, too. Using lasers to blast off surface material like this is called laser ablation, and it turns out to be a promising method for spacecraft propulsion.[...] it will take a few months for the Moon to be pushed out of range of our laser. It will keep most of its mass, but escape Earth's gravity and enter a lopsided orbit around the sun.Hitting the Moon with $ 500 cdot 10^12 times 7 cdot 10^9 = 3.5 cdot 10^24 W$ of power would do the job.Although xkcd is discussing pushing the Moon away, the numbers are similar for deorbitting it.No one is going to be deorbiting the Moon using weapons fire.
keine Daten
Schnell verbindung

Zuhause

Service

Über uns

Kontaktieren Sie uns

UNSER PRODUKT

Das moderne Haus

Landschafts haus

Vintage Haus

Guangzhou DaLong CNC Machinery Technology Co.Ltd spart keine Kosten, wenn es darum geht, sicherzustellen, dass wir über die neueste und beste Ausrüstung verfügen.

keine Daten
ÜBER UNS

Unternehmens profil

Unternehmens geschichte

KONTAKTIEREN SIE UNS

Copyright © 2021-2035 Guangzhou DaLong CNC Machinery Technology Co.Ltd | Sitemap

Wholesale Machinery supply Melayu  |  Milling machine manufacturer العربية  | EDM Machine factory OEM