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Title:
MICRO IMAGING LENS FOR SHORT-DISTANCE IMAGING
Document Type and Number:
WIPO Patent Application WO/2021/007930
Kind Code:
A1
Abstract:
A micro imaging lens for short-distance imaging. The micro imaging lens sequentially comprises a first lens group (100), an aperture (300), and a second lens group (200) from an object side to an image side of an optical axis; the first lens group (100) and the second lens group (200) have positive focal power. An object-side clear aperture of the first lens group (100) is larger than an image-side clear aperture thereof, an object-side clear aperture of the second lens group (200) is smaller than an image-side clear aperture thereof, and specific technological parameters are provided. A lens configuration having a sandwich structure composed of the first lens group (100), the aperture (300), and the second lens group (200), can obtain a high short-distance imaging effect under the condition of miniaturization, and can effectively reduce aberration, especially distortion and chromatic aberration, during short-distance imaging; moreover, the diameter of the lens can be effectively reduced, the size of the lens is reduced, the processing difficulty and the processing cost are reduced, and the total optical tube length of a structure consisting of the lens and a detector can be effectively reduced.

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Inventors:
ZENG SHAOQUN (CN)
HU QINGLEI (CN)
HUANG KAI (CN)
LI NING (CN)
LI MENGTING (CN)
Application Number:
PCT/CN2019/103999
Publication Date:
January 21, 2021
Filing Date:
September 02, 2019
Export Citation:
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Assignee:
CONVERGENCE TECH CO LTD (CN)
UNIV HUAZHONG SCIENCE TECH (CN)
International Classes:
G02B13/00; G02B13/18
Foreign References:
CN101614866A2009-12-30
CN103003734A2013-03-27
CN106886085A2017-06-23
CN106483639A2017-03-08
CN108008525A2018-05-08
CN108732723A2018-11-02
CN109407279A2019-03-01
KR101429890B12014-08-13
Other References:
See also references of EP 4001986A4
Attorney, Agent or Firm:
WUHAN DONGYU PATENT AGENCY (CN)
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