OPTICAL SYSTEM WITH VARIABLE MAGNIFICATION

摘要

An optical system with variable magnification is disclosed for video recording with a CCD-camera on a microscope. Three optical members (1, 2, 3) with a positive focal length are provided to create a short video zoom system that allows practically all required magnifications for video cameras. One optical member (1) is fixed and the second and third optical members are slidingly arranged downstream of the first one, in the direction of magnification.