Title:
4K ULTRA-HIGH-DEFINITION LAPAROSCOPIC RELAY LENS STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2022/048081
Kind Code:
A1
Abstract:
A 4K ultra-high-definition laparoscopic relay lens structure, which consists of two completely symmetrical groups of three glued lenses, and the two groups of three glued lenses are sequentially glued together along the light direction; and each group of three glued lenses comprises a first lens (1), a second lens (2) and a third lens (3), a side surface of the first lens (1) has an even aspheric structure, and the other side surface is a concave surface, both side surfaces of the second lens (2) are convex surfaces, and a side surface of the third lens (3) is a concave surface and the other side surface has an even aspheric structure. The concave surface of the first lens (1) and a convex side surface of the second lens (2) are opposite and glued together, and the other convex side surface of the second lens (2) and the concave surface of the third lens (3) are opposite and glued together. The structure achieves an aberration balance and can satisfy 4K resolution when the numerical aperture reaches 0.12, which is a 50% increase compared with FHD.
Inventors:
FANG ZHIGANG (CN)
ZHANG JIANZHONG (CN)
ZHANG JIANZHONG (CN)
Application Number:
PCT/CN2020/140592
Publication Date:
March 10, 2022
Filing Date:
December 29, 2020
Export Citation:
Assignee:
EAGLESCOPE MEDICAL TECH CO LTD (CN)
International Classes:
A61B1/313; G02B23/24
Domestic Patent References:
| WO2018135192A1 | 2018-07-26 |
Foreign References:
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| JP2015118136A | 2015-06-25 |
Attorney, Agent or Firm:
CHANGZHOU RIGHT NAVIGATION PATENT AGENCY CO, LTD. (CN)
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