| 发明名称 |
Wide-angle lens for film-combined type cameras |
| 摘要 |
The present invention provides a wide-angle lens for film-combined type cameras, comprising a first lens element having a negative refractive power and a second lens element having a positive refractive power which have more than one aspherical surface.
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| 申请公布号 |
US5508848(A) |
申请公布日期 |
1996.04.16 |
| 申请号 |
US19930033419 |
申请日期 |
1993.03.18 |
| 申请人 |
YAMANASHI FACTORY OF NISSIN KOHKI, MFG. CO., LTD. |
发明人 |
INOUE, TOSHIYUKI |
| 分类号 |
G02B13/04;G02B9/10;G02B13/06;G02B13/18;(IPC1-7):G02B13/18 |
主分类号 |
G02B13/04 |
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