发明名称 |
Projection lens with color correction |
摘要 |
A partially color corrected projection lens having three groups comprising from the image end a first group serving to correct aberrations, a second group supplying essentially all of the positive power of the lens and a third negative group where the second group comprises two positive elements with a negative element therebetween.
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申请公布号 |
US4815831(A) |
申请公布日期 |
1989.03.28 |
申请号 |
US19850778126 |
申请日期 |
1985.09.20 |
申请人 |
U.S. PRECISION LENS, INCORPORATED |
发明人 |
BETENSKY, ELLIS I. |
分类号 |
G02B13/16;G02B13/18;(IPC1-7):G02B13/18;G02B9/00 |
主分类号 |
G02B13/16 |
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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