| 发明名称 |
Compact wide-angle objective |
| 摘要 |
A wide-angle objective of compact construction and comparatively small diameter has its first lens element formed as a convex negative meniscus and its last or sixth lens element formed as a biconcave construction with the fourth lens element being a thick cemented lens.
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| 申请公布号 |
US4773745(A) |
申请公布日期 |
1988.09.27 |
| 申请号 |
US19870092259 |
申请日期 |
1987.09.02 |
| 申请人 |
JOS. SCHNEIDER OPTISCHE WERKE KREUZNACH GMBH & CO. KG |
发明人 |
SCHITTHOF, HILTRUD |
| 分类号 |
G02B9/62;G02B13/04;(IPC1-7):G02B9/62 |
主分类号 |
G02B9/62 |
| 代理机构 |
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代理人 |
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