Microscope lighting unit for medical operation use has optical unit with longitudinal movement of lens groups relative to light source behind variable aperture

摘要

A microscope lighting unit has an optical unit with variable aperture (22) in variable position before an optical system with spherical or aspherical collector (23) fixed relative to the light source (21) and dispersing (31) and collecting (32) lens group moving longitudinally along the optical axis (40) to control the illumination field (50).