| 摘要 |
PURPOSE:To maintain the plane precision of a mirror plate and improve picture quality by eliminating pressure applied directly to a mirror plate by using an elastic blank material for holding the mirror plate. CONSTITUTION:A mirror plate 2 is joined onto a base plate 1 through an elastic blank material 3, the base plate 1 is made larger than the mirror plate 2, and the top surface of the presser piece 6 of the 2nd elastic blank material 4 at the edge part of the base plate 1 is pressed with a leaf spring 10. Then, an adjusting screw 12 piercing a mirror driving part 11 from below abuts on the base plate 1 to adjust the angle of the mirror plate 2. Therefore, direct holding force is not applied to the mirror directly, but is received by the 1st and the 2nd elastic blank materials 3 and 4 partially, so the plane precision of the mirror plate 2 is held and the oscillation of the mirror is prevented, so the picture quality is improved. |
