Title:
PHOTOGRAPHIC OBJECTIVE LENS
Document Type and Number:
WIPO Patent Application WO/2016/033743
Kind Code:
A1
Abstract:
A photographic objective lens, comprising first to seventh lenses (L1-L7) successively and coaxially arranged along the transmission direction of incident light rays. The first lens (L1) is a meniscus-type negative lens, the second lens (L2) is a drum-shaped lens, the third lens (L3) is a meniscus-type negative lens, the fourth lens (L4) is a drum-shaped lens, the fifth lens is a biconcave-type lens (L5), the sixth lens (L6) is a meniscus-type positive lens, and the seventh lens (L7) is a biconvex-type lens. Two curved surfaces of each lens are respectively the light incident surface and the light exit surface of the lens.
Inventors:
LI JIAYING (CN)
ZHOU CHAOMING (CN)
GAO YUNFENG (CN)
ZHOU CHAOMING (CN)
GAO YUNFENG (CN)
Application Number:
PCT/CN2014/085789
Publication Date:
March 10, 2016
Filing Date:
September 03, 2014
Export Citation:
Assignee:
HANS LASER TECHNOLOGY CO LTD (CN)
International Classes:
G02B11/34; G02B9/64; G02B13/06
Foreign References:
| US3622227A | 1971-11-23 | |||
| CN103592746A | 2014-02-19 | |||
| US20050117225A1 | 2005-06-02 | |||
| US3958864A | 1976-05-25 | |||
| US3870402A | 1975-03-11 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
广州华进联合专利商标代理有限公司 (CN)
广州华进联合专利商标代理有限公司 (CN)
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