| 摘要 |
PROBLEM TO BE SOLVED: To enhance display quality by preventing color slippage of plural light beams, used in scanning by a single deflector, prevent the interference of the plural light beams from occurring and to enhance the assemblability of a reflecting mirror guiding the deflected light beam to an image forming position from a final correction lens. SOLUTION: A first reflection mirror 28a and a second reflection mirror 28b are arranged facing opposite via a scanning surface leading to the mirror 28a from a second image forming lens 26 so as to prevent four laser light beams 27a-27d from mutually interfering. Also, all of the mirrors 28a-28c are put in an aperture part from the side surface of an optical frame 21 and fixed to the aperture part with a reflecting surface as a positioning reference.
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