Laser how does it work video

OverView MVL Upgrade to LED video wall. Get a quote. Support Technical support. Please log in to your mybarco to download this file. Log in. Functional CRT-based projectors are now very rare. Tubes have since been replaced with lamps, combined with special mirrors or color wheels that separate the light into red, green, and blue, and a separate "imaging chip" that provides the image detail. Depending on the type of imaging chip used LCD, LCOS, or DLP , the light coming from the lamp, mirrors, or color wheel, has to pass through or reflect off of the imaging chip, which produces the picture you see on the screen.

However, lamps still waste a lot of energy outputting the entire light spectrum, even though only the primary colors of red, green, and blue are actually needed. Although not as bad as CRTs, lamps still consume a lot of power and generate heat, necessitating the use of a potentially noisy fan to keep things cool.

Also, from the first time you turn on a video projector, the lamp starts to fade and will eventually burn out or become too dim usually after 3, to 5, hours. Even CRT projection tubes, as big and cumbersome as they were, lasted a lot longer.

The short lifespan of lamps necessitates periodic replacement at an added cost. Today's demand for eco-friendly products many projector lamps also contain Mercury , calls for an alternative that can do the job better. LEDs are much smaller than a lamp and can be assigned to emit just one color red, green, or blue.

With their smaller size, projectors can be made much more compact, even inside something as small as a smartphone. LEDs are also more efficient than lamps, but they still have a couple of weaknesses. To solve the problems of lamps or LEDs, a laser light source can be used. Lasers have been in use since about as tools in medical surgery such as LASIK , in education and business in the form of laser pointers and distance surveying, and the military uses lasers in guidance systems, and as possible weapons.

When used as a video projector light source, lasers provide several advantages over lamps and LEDs. Just as with "LED TV," the laser s in a projector don't produce the actual detail in the image but provide the light source that enables projectors to display full color-range images on a screen.

However, it is easier just to use the term "laser projector" rather than "DLP or LCD video projector with a laser light source. Mitsubishi was the first to use lasers in a consumer video projector-based product. In , they introduced the LaserVue rear-projection TV.

Unfortunately, Mitsubishi discontinued all of their rear-projection TVs including the LaserVue in The LaserVue TV employed three lasers, one each for red, green, and blue. The resulting images were then displayed on screen. LaserVue TVs provided excellent light output capability, color accuracy, and contrast.

The above images and the following descriptions are generic; there may be slight variations depending on manufacturer or application. On the right is the laser equipment, consisting of a gain medium cylinder capped by two mirrors, the one on the right end being partially transparent. These components make up the laser's optical cavity. Behind that is the pumping device, which provides energy to the gain medium, seen as flashes of light. On the left of the animation is a diagram showing the states of the atoms in the gain medium seen as blue dots in the medium and on the diagram.

Initially these are all in the ground low energy state. A flash from the pump raises some into the excited state. When more atoms are excited than ground, the system is said to be in a population inversion. When atoms fall back to the ground state they emit photons red. At the same time, only a certain radiation can leave the resonator through the one-way mirror.

This bundled radiation is the laser radiation. Due to these properties, the laser light is used in many areas of modern material processing. The intensity is preserved for a long time due to the coherence and can be bundled even further through lenses. The laser beam impinges on the material surface, is absorbed and thus heats the material. Due to this generation of heat, the material can be removed or completely evaporated.

It is thus possible to engrave, to mark or to cut a plurality of materials. Our laser experts are happy to answer your questions about our products and laser processing.