OPTICAL DEVICE

• Main Authors: TAKAHASHI KAZUO, KUROKI YOUICHI
• Format: Patent
• Language: English
• Published: 17.09.1985
• Subjects: APPARATUS SPECIALLY ADAPTED THEREFOR; BASIC ELECTRIC ELEMENTS; CINEMATOGRAPHY; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; MATERIALS THEREFOR; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORIGINALS THEREFOR; PHOTOGRAPHY; PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES; PHYSICS; SEMICONDUCTOR DEVICES

PURPOSE:To enable positioning with high accuracy by providing an electrical driving means for applying driving force to an optical element, a stopper for positioning the optical element in a prescribed position and an elastic member for pressing the optical element to a stopper. CONSTITUTION:A pulse motor 14 is driven to rotate a gear 11 in an arrow (b) direction in the case of moving a mirror 7 from the 1st position 7a for observation to the 2nd position 7b for exposing. The mirror 7 is rotated in the arrow (b) direction as well by the energizing force of a spring 12 according to said rotation. The mirror 7 stops by contacting with a stopper 10. The mirror 7 cannot rotate any more in this stage but the gear rotates further in the arrow (b) direction because a spring 12 is interposed between said gear and the mirror 7. A photoswitch 15 detects the contact of the mirror 7 with a stopper 10 and stops the motor 14 and thereafter the motor 14 is rotated by as much as the prescribed number of pulses so that the mirror 7 is pressed stably to the stopper 10 in the 2nd position by the spring 12.