| 摘要 |
PROBLEM TO BE SOLVED: To thin an apparatus in a simple constitution by pressing a movable supporting member by means of a leaf spring to a slide face formed at a side part of a supporting part, thereby maintaining a position of the supporting member, and sliding the movable supporting member on the slide face with the use of an adjusting jig when the position of the supporting member is to be adjusted. SOLUTION: A movable supporting member 4 elastically holds a lens holder 2 via a straight wire 3, so that an objective lens 1 is supported floating horizontally. A position regulation pin 4a is set at a side face part of the movable supporting member 4 to pass a pupil face of the objective lens 1 and, spherical projections 4b, 4c, 4d are provided at three points at a peripheral part about the pin 4a. A slide face 5c of a spherical surface centering an optical center of the objective lens 1 is formed at a side part 5b of a supporting part 5a which is a perpendicular wall of a housing 5. The movable supporting member 4 is pressed by a leaf spring 6, and consequently the spherical projections 4b, 4c, 4d are butted to the slide face 5c. A position of the movable supporting member is maintained accordingly. |
