| 摘要 |
PROBLEM TO BE SOLVED: To provide a tilt adjusting mechanism for a lens barrel having simple configuration and capable of largely changing the tilt of a lens without disturbing the smooth movement of a lens frame with respect to the lens barrel. SOLUTION: The lens barrel has a lens holding ring in which the lens is fixed; and a reference ring composed of a different member from the lens holding ring and supporting the lens holding ring. In the tilt adjusting mechanism for the lens barrel, three elastically deformed mount parts to be elastically deformed are formed to be positioned on a plane orthogonal to an optical axis nearly at equal intervals in a circumferential direction on the end face of the reference ring, a fixed flange part fixed on the three elastically deformed mount parts and an annular part in which the lens is fixed are formed on the lens holding ring, and screw holes in a radial direction are formed corresponding to the three elastically deformed mount parts on the reference ring. A flat head screw half-bearing surface abutting and engaged with the almost half on the lens holding ring side of the flat head part of a flat head screw screwed in each screw hole is formed on the reference ring or the lens holding ring. The tilt to the cross section orthogonal to the optical axis of a plane regulated by the three elastically deformed mount parts is changed according to the screwing amount of the flat head screw. COPYRIGHT: (C)2004,JPO&NCIPI
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