Laser Stars Projector
Welcome to our most popular and just the best Laser Projector, laser projectors road shows online guide!The systems work either by scanning the entire picture a dot at a time and modulating the laser directly at high frequency, much like the electron beams in a CRT, or by optically spreading and then modulating the laser and scanning a line at a time, the line itself being modulated in much the same way as in a DLP. When well implemented this technology produces the broadest color gamut available in practical display equipment today, derived from the fact that lasers produce truly monochromatic primaries.
The video signal is introduced to the laser beam by an acousto-optic modulator (AOM) that uses a photorefractive crystal to separate the beam at distinct diffraction angles. The beam must enter the crystal at the specific Bragg angle of that AOM crystal. A piezoelectric element transforms the video signal into vibrations in the crystal to create a diffraction grating.
A rapidly rotating polygonal mirror gives the laser beam the horizontal refresh modulation. It reflects off of a curved mirror onto a galvanometer-mounted mirror which provides the vertical refresh. Another way is to optically spread the beam and modulate each entire line at once, much like in a DLP, reducing the peak power needed in the laser and keeping power consumption constant.
There are several realizations of LPs. E.g. the technology of the German company Jenoptik LDT GmbH is based on the principle of a flying light spot writing the image directly on a screen.
A LP of this type consists of three main components: A laser source uses the video signal to provide modulated light being composed of three sharp spectral colours red, green and blue. A flexible fibre optical waveguide transports this light to a relatively small projection head that deflects the beam according the pixel clock and emits it onto a screen at an arbitrary distance. These LPs and laser projection systems are used at the professional market for flight simulators, planetariums as well as for virtual reality applications.
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