发明名称 |
Imaging optical system having a moire elimination effect |
摘要 |
An imaging optical system for forming images of objects on an image surface. The optical system includes an aspherical surface that functions to reduce spatial frequency response of the optical system when aperture size of the optical system is reduced within a variable range and adapted so as to eliminate spurious signal by the aspherical surface.
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申请公布号 |
US5270825(A) |
申请公布日期 |
1993.12.14 |
申请号 |
US19900596074 |
申请日期 |
1990.10.11 |
申请人 |
OLYMPUS OPTICAL CO., LTD. |
发明人 |
TAKASUGI, YOSHIHARU;HASEGAWA, AKIRA |
分类号 |
A61B1/04;G02B27/60;H04N5/225;(IPC1-7):H04N5/30 |
主分类号 |
A61B1/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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