Many very useful invention using lasers. Many inventions to entertain us. CD and some DVD players use lasers. Bar code reader using laser in a store. Doctors use laser for delicate surgery, such as eye surgery. Laser to TV and phone signal special cables. Metal workers use laser cutting and welding metal on everything from street lamp pole car. Workers in clothing factories use laser through hundreds of layers of fabric once. Also laser light projector uses laser to work with a good effection in different color.
This is a challenging project, to build laser projection with professional grade: -). The most important part used laser projector is laser unit, laser has been widely used in discussion early, colorful mixed gas lasers now used for high-end laser projector and solid laser is a kind of brand-new laser device, has recently been used. However laser unit is expensive and garbage discussion cannot directly gas laser modulation, so that I can get cannot fundamentally solved laser unit modulator. In the first quarter of this year solid-state lasers, making reasonable template has sales, I decided to Denshi altogether to start this project this thought for a long time. "
Light from a laser contains an exact color or wavelength, not many different wavelengths. Scientists say, laser is "monochromatic, one color of meaning.
Laser light waves in the same direction, exactly parallel to each other. This means that a laser beam are very narrow and can focus on a small points. Scientists say the laser is "parallel."
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