Title:
LARGE-APERTURE ANAMORPHIC LENS
Document Type and Number:
WIPO Patent Application WO/2021/103247
Kind Code:
A1
Abstract:
A large-aperture anamorphic lens, comprising an anamorphic group composed of cylindrical lenses and an imaging group composed of spherical lenses that are arranged in succession from an object side to an image side, wherein the anamorphic group comprises a first lens (1), a second lens (2) and a third lens (3) that are arranged in succession from the object side to the image side, the first lens (1) and the second lens (2) are cylindrical lenses that have negative focal power, and the third lens (3) is a cylindrical lens that has a positive focal power. By using the optical characteristics of the cylindrical lenses that form the anamorphic group, incoming horizontal light is "compressed", while light entering the vertical field of view remains unchanged. Then, the light is comprehensively corrected by the subsequent imaging group, so that the horizontal field-of-view angle is increased by 33%, thereby achieving 1.33X anamorphic photographing. Moreover, the lens of the present solution is smaller in size, lighter in weight, and relatively low in cost, which may better meet the usage requirements of most ordinary users.
Inventors:
LI JIE (CN)
WU WEI (CN)
LI WULIN (CN)
WU WEI (CN)
LI WULIN (CN)
Application Number:
PCT/CN2019/128519
Publication Date:
June 03, 2021
Filing Date:
December 26, 2019
Export Citation:
Assignee:
GUANGDONG SIRUI OPTICAL CO LTD (CN)
ZHONGSHAN AZU OPTOELECTRONICS TECH CO LTD (CN)
ZHONGSHAN AZU OPTOELECTRONICS TECH CO LTD (CN)
International Classes:
G02B7/02
Foreign References:
| CN107907976A | 2018-04-13 | |||
| CN105467566A | 2016-04-06 | |||
| CN207516627U | 2018-06-19 | |||
| CN104007541A | 2014-08-27 | |||
| CN107479173A | 2017-12-15 | |||
| JP4332923B2 | 2009-09-16 |
Other References:
See also references of EP 3848741A4
Attorney, Agent or Firm:
SUNSHINE INTELLECTUAL PROPERTY INTERNATIONAL CO., LTD. (CN)
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