Abstract
We report the design and fabrication of Hybrid Dichroic Mirrors (HDM) for the separation and the recombination of white laser beam by using small sized flat plate for a small Laser Projection Display (LPD) system. This small sized laser projection display system is consist of a white laser, hybrid dichroic mirrors, 3-channel AOM and a beam scanning part. Red, green and blue light beams are separated by one flat plate dichroic mirror and also modulated by the 3-channel AOM, are recombined to one beam by another flat plate dichroic mirror. These hybrid dichroic mirrors are designed to measure the separation and recombination of s-polarized light beams of 647, 515, 488 nm wavelength from the white laser. Key element of the mirror design includes the quarter wavelength multilayers optimized to provide the best performance for the separation and recombination of light beams. The calculated values of the transmittance, which are pass through the hybrid dichroic mirror, are 95% for each separated/recombined color beams. The measured values of transmittance are over 90%.
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