| 摘要 |
PROBLEM TO BE SOLVED: To correctly condense each light beam at a prism body by correcting the deviation of an optical path caused by the distortion of a chassis. SOLUTION: A liquid crystal projector possesses a light source 35, the chassis 3 housing total reflection mirrors 75, 76, 77 and 78 and dichroic mirrors 45 and 46 so as to make them inclined to the optical path and a fitting protrusion 8 which is positioned on the side of the light source 35 of respective total reflection mirrors 75 and 76 along the optical path in the inside of the chassis 3 and in which an adjustment mirror 5 reflecting light from the light source 35 is fitted, and the chassis 3 is molded of a synthetic resin. The adjustment mirror 5 is firstly fitted in the fitting protrusion 8 on the side of the light source 35, and initial adjustment of the light from the light source 35 to a position so as to follow a normal optical path is executed based on the light reflected by the adjustment mirror 5. Next, the adjustment mirror 5 is pulled out, and is fitted in the fitting protrusion 8 positioned on the side of the advancing direction of a one-stage optical path, so that the deviation of the total reflection mirrors 75, 76, 77 and 78 and the dichroic mirrors 45 and 46 from a normal position is detected from the deviation between incident light and outgoing light at the optical path entrance of the chassis 3. |
