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Title:
OPTICAL LENS
Document Type and Number:
WIPO Patent Application WO/2009/132537
Kind Code:
A1
Abstract:
An optical lens comprises a lens group and a diaphragm (1) located in front of the lens group. The lens group comprises a first lens (L1), a second lens (L2), and a third lens (L3) in order. The first lens is a biconcave negative lens, the second lens is a meniscus positive lens with a concave surface facing to the diaphragm, and the third lens is a biconvex positive lens. The ratios of the focal lengths f1, f2 and f3 of the first, the second and the third lenses to the focal length f of the whole optical system, respectively, satisfy the following relationships:-0.7

Inventors:
GAO YUNFENG (CN)
LI JIAYING (CN)
BAO RUIWU (CN)
SUN BO (CN)
ZHOU CHAOMING (CN)
Application Number:
PCT/CN2009/070882
Publication Date:
November 05, 2009
Filing Date:
March 19, 2009
Export Citation:
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Assignee:
HANS LASER TECHNOLOGY CO LTD (CN)
GAO YUNFENG (CN)
LI JIAYING (CN)
BAO RUIWU (CN)
SUN BO (CN)
ZHOU CHAOMING (CN)
International Classes:
G02B13/00; G02B9/12; G02B26/10
Foreign References:
CN101369046A2009-02-18
JPS61286810A1986-12-17
JPS63267910A1988-11-04
US4880299A1989-11-14
JPH0497211A1992-03-30
JPS62254110A1987-11-05
Attorney, Agent or Firm:
SHENZHEN ZHONGYI PATENT AND TRADEMARK OFFICE (Old Shenzhen Special Zone Newspaper Building No. 1014, Shennan Road C., Futian Distric, Shenzhen Guangdong 8, CN)
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