| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an objective lens of high performance without changing a front lens diameter. <P>SOLUTION: An optical element fixing member 10 is brought into contact with an outer peripheral part of an optical element to hold the optical element in a barrel and includes a collar-shaped portion 3 projecting in a direction of an optical axis of the optical element and a portion where the projecting collar-shaped portion is cut around the optical axis, and an aperture diameter d2 of the optical element defined by only the cut portion is larger than an aperture diameter d3 of the optical element defined by the collar-shaped portion. <P>COPYRIGHT: (C)2012,JPO&INPIT |
