Patent ID: 7476873
Filing Date: 2009-01-13
Classification: G02B

Abstract:
1. A microscope system comprising, at least: an objective lens which converts a luminous flux emergent from an object into a parallel luminous flux, an afocal variable magnification optical system which changes a diameter of the parallel luminous flux emergent from the objective lens into a different diameter, and an image forming optical system for forming an image out of the parallel luminous flux emergent from the afocal variable magnification optical system, wherein the following conditions are satisfied: where NA(ob) is a maximum effective numerical aperture of an objective lens, FL(ob) is a focal length, in millimeters, of the objective lens, X=2·NA(ob)·FL(ob), Lexz is a distance, in millimeters, from an object surface to a most distant end of the afocal variable magnification optical system.