Device for inserting filters or changing aperture or lens in optical instruments e.g. endoscope - comprises slide with openings driven by servo motor powered crank wheel

摘要

The slide (1) has openings for optical elements (1a, 1b) and the crank wheel (2) is mounted on the servo motor shaft. The slide is moved between two end points by the crank handle. The housing in which the slide moves has an opening (3a) for the ray path, and the servo motor (4) is fixed on this. The turning angle of the servo is a maximum of one hundred and eighty degrees, and the maximum diameter of the optical elements is twice the crank radius. Only a slit shaped optical element whose position or properties constantly changes along the adjustment path is set in the slide. ADVANTAGE - Robust and simple without revertive signal.