| 发明名称 |
Single lens having one spherical and one aspherical refractive surface |
| 摘要 |
A lens having a spherical surface and an aspherical surface curved relative to each other to minimize coma for a large diffraction-limited field and a large numerical aperture.
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| 申请公布号 |
US4415238(A) |
申请公布日期 |
1983.11.15 |
| 申请号 |
US19810307717 |
申请日期 |
1981.10.02 |
| 申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
BRAAT, JOSEPHUS J. M.;HAISMA, JAN;PRAST, GIJSBERT |
| 分类号 |
G02B13/00;G02B3/02;G02B3/04;G02B13/18;G02B21/02;(IPC1-7):G02B13/18 |
主分类号 |
G02B13/00 |
| 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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