| 摘要 |
PROBLEM TO BE SOLVED: To provide a movable mirror frame for focusing with which equipment performance such as high speed photography is enhanced by reducing its mass. SOLUTION: In the movable mirror frame 15 for focusing to be a form of one embodiment of this invention, a mirror surface 22 and a light shielding cover 23, etc., are integrally constituted by molding them by using materials such as synthetic resin (polycarbonate) different from the case with the conventional technology where a movable frame is combined with a mirror member consisting of a glass member. Thus, the mass of the mirror frame 15 for focusing itself can be reduced than that of the conventional one. Consequently, reduction of required kinetic energy regarding supporting axes 16 and 13 of the movable mirror frame 15 for focusing is enabled and the movable mirror frame 15 for focusing largely contributes to enhancement of the equipment performance such as the high speed photography. |
