OPTICAL ELEMENT HOLDING STRUCTURE, CAMERA FILTER FRAME, CAMERA FILTER UNIT, AND IMAGING LENS

摘要

A camera filter unit (1) includes an optical filter (2), a filter holding ring (3), and a filter frame (4) that are coaxially disposed in this order from the inside to the outside. The optical filter (2) has a tapered annular chamfered surface (13) on an outer peripheral edge of a rear filter surface (12). The filter holding ring (3) includes a front stopper (21) that is abuttable on the optical filter (2) from a front (X1) and a rear stopper (22) that extends along the annular chamfered surface (13). The filter frame (4) includes a second rear stopper (32) that prevents the optical filter (2) from moving to a rear (X2). The optical filter (2) is held by the filter holding ring (3) in a rotatable manner about an axis L. The optical filter (2) is fixed in a relatively unrotatable manner by the second rear stopper (32) abutting on the rear filter surface (12).

主权项

1. An optical element holding structure comprising:
a cylindrical body into which an optical element is inserted coaxially on an inner peripheral side; a front stopper that is abuttable on an outer peripheral edge of a front surface of the optical element from a front in an axial direction; and a rear stopper that is abuttable on an outer peripheral edge of a rear surface of the optical element from a rear in the axial direction, wherein the optical element is held between the front stopper and the rear stopper in a rotatable manner about an axis.