LENS DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a lens device which can stably support a lend frame by forming cam grooves or rectilinear grooves that cam followers of lens frames except one lend frame on the one lends frame and using the one lends frame as a cam cylinder or rectilinear cam cylinder for other lend frames. SOLUTION: On the lend from 32 of a 1st moving lend 14 constituting a projection lend device 10, rectilinear grooves 46 and 48 which are parallel to the optical axis A are formed. A cam pin 52 provided to a lends frame 50 holding a 2nd moving lend 16 is fitted to the rectilinear groove 46. A cam pin 58 provided to a lens frame body 56 holding a 3rd moving lens 18 is fitted to the rectilinear groove 48.