Title:
PRIME LENS AND VEHICLE-MOUNTED CAMERA SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/221138
Kind Code:
A1
Abstract:
A prime lens (100) and a vehicle-mounted camera system (400). The prime lens (100) sequentially comprises from an object side to an imaging surface (2): a first lens (L1) which has a negative focal length and is a crescent-shaped spherical lens of which a concave surface (S2) faces the imaging surface (2); a second lens (L2) which has a negative focal length and is a double concave spherical lens; a third lens (L3) which has a positive focal length and is a double convex spherical lens; a fourth lens (L4) which has a positive focal length and is a double convex spherical lens; a fifth lens (L5) which has a positive focal length and is a double convex spherical lens; a sixth lens (L6) which has a negative focal length and is a double concave spherical lens; and a seventh lens (L7) which has a positive focal length and is a double convex non-spherical lens. The second lens (L2) and the third lens (L3) are cemented by means of an optical adhesive, and the fifth lens (L5) and the six lens (L6) are cemented by means of an optical adhesive. Two groups of cemented lenses are provided so that the prime lens (100) is small in size and light in weight, requires low processing precision, and is convenient to assemble, which can ensure high quality resolution.
Inventors:
GAO BO (CN)
LI WEINA (CN)
HUANG JIANXIN (CN)
HAN JIAN (CN)
LI WEINA (CN)
HUANG JIANXIN (CN)
HAN JIAN (CN)
Application Number:
PCT/CN2020/086776
Publication Date:
November 05, 2020
Filing Date:
April 24, 2020
Export Citation:
Assignee:
JIANGXI LIANCHUANG ELECT CO LTD (CN)
International Classes:
G02B13/00; G02B7/02; G02B13/18
Foreign References:
| CN110133828A | 2019-08-16 | |||
| CN108469667A | 2018-08-31 | |||
| JP5265218B2 | 2013-08-14 | |||
| CN109541780A | 2019-03-29 | |||
| CN108490589A | 2018-09-04 |
Attorney, Agent or Firm:
SHENZHEN ZHIQUAN INTELLECTUAL PROPERTY OFFICE (CN)
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