Patent ID: 6674515
Filing Date: 2004-01-06
Classification: G03B

Abstract:
A light beam cut-off device comprising:a shutter member disposed between a light beam scanning device which emits a light beam, and a photosensitive material exposed by a light beam emitted from the light beam scanning device, and supported in a movable manner between a cut-off position at which an optical path of the light beam emitted from the light beam scanning device is cut off by the shutter member, and an open position at which the shutter member retreats from the optical path of the light beam emitted from the light beam scanning device; a shutter driving portion for moving the shutter member to the open position at the time the photosensitive material is exposed by the light beam scanning device, and moving the shutter member to the cut-off position at the time exposure for the photosensitive material is stopped; a chassis member on which the shutter member and the shutter driving portion are mounted; and a vibration cut-off portion which prevents transmission of a vibration from the chassis member to the light beam scanning device.