| Popis: |
The design and principles of a high definition laser display system with multi-beam scanning are described. The system employs 4 laser beams each being composed of red, green and blue components. The four beams from one scanner are scanned simultaneously by a rotating polygonal mirror for horizontal deflection and by a galvanometer for vertical deflection. Compared with conventional single-beam scanning, the new design has the following advantages: 1) The rotational speed of the polygonal mirrors can be reduced by a factor of 4, which would improve the system performance and decrease the difficulties of the manufacture of the system. The size of the polygonal facet and, therefore, the laser beam diameter can be increased which would decrease the pixel diffusion. 2) The simultaneous operation of the 4 modulators would improve the horizontal resolution by a factor of 4. 3) For the same screen brightness, the single pixel power density can be reduced by a factor of 4 which would decrease the hazardous laser radiation.© (2000) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only. |
