OPTICAL DEVICE
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...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
17.09.1985
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Subjects | |
Online Access | Get full text |
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Summary: | 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. |
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Bibliography: | Application Number: JP19840036163 |