Optical system for endoscope |
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| 申请号 | JP22653188 | 申请日 | 1988-09-12 | 公开(公告)号 | JPH0274912A | 公开(公告)日 | 1990-03-14 |
| 申请人 | Olympus Optical Co Ltd; | 发明人 | TAKASUGI YOSHIHARU; FUKUDA HIROYUKI; | ||||
| 摘要 | PURPOSE: To prevent color shading from being generated by providing a field lens on an image side of an image forming lens provided with a brightness diaphragm and specifying a relation between a focal distance of the field lens and a focal distance of the whole system. CONSTITUTION: The title optical system is an optical system in which a field lens LF is provided on an image side of an image forming lens LM provided with a brightness diaphragm S, and also, a solid-state image pickup element CCD is placed on its injection side, and satisfies a condition, fF |
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| 说明书全文 | |||||||
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