Iris light aperture stop for optical microscope has rotation of operating element transmitted to rotary setting ring via coupling drive using flat levers for reducing overall thickness

摘要

The iris light aperture stop (1) has a stationary fixing ring (2), a rotary setting ring (3) and a number of iris lamella elements (4), controlled by rotation of the setting ring for continuous variation of the size of a light aperture (5) between a maximum aperture size and a minimum aperture size. The setting ring has an attached coupling drive (6) with at least 2 flat levers (7,8), driven by a rotatable operating element (9), with a shutter element (11) attached to one of the levers for movement in front of the light aperture upon reaching a given aperture size.