| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem, wherein in the conventional optical element holding member which supports an optical element, by a holding member through an elastic part deformable in a radial direction, rigidity in the radial direction is significantly lowered and the position of the optical element is not kept stable, consequently, optical performance deteriorates, even if influence due to volume change of the holding member can be reduced. <P>SOLUTION: The optical element holding member is constituted of a ring-like member, and the ring-like member is provided with a notch or a notch and a slit so as not to continue on an optional periphery of concentric circles, with the center shaft of the ring-like member as a center. <P>COPYRIGHT: (C)2010,JPO&INPIT |
