| 摘要 |
A Microscope system comprises, at least, an objective lens which changes luminous flux from an object into parallel luminous flux, an afocal variable magnification optical system which changes a diameter of luminous flux emanated from the objective lens into a different diameter of luminous flux, and an image forming optical system by which an image forming of the parallel luminous flux emanated from the afocal variable magnification optical system is carried out, and the following conditions are satisfied: <?in-line-formulae description="In-line Formulae" end="lead"?>2.NA(ob).FL(ob)>=30 <?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>6<=Lexz/X<=10 <?in-line-formulae description="In-line Formulae" end="tail"?> where NA(ob) is the maximum effective aperture size of an objective lens, FL (ob) is the focal length of the objective lens, X=2.NA(ob).FL(ob), and Lexz is the distance from an object surface to the most distant end of the afocal variable magnification optical system.
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