Title:
OBJECT-SIDE TELECENTRIC LENS AND 3D OPTICAL ENDOSCOPE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/103525
Kind Code:
A1
Abstract:
An object-side telecentric lens and a 3D optical endoscope system, relating to the technical field of 3D imaging and medical instruments. The object-side telecentric lens comprises a first lens (1), a second lens group and a third lens group which are provided between an object plane (O) and an image plane (I) and sequentially provided along a same optical axis. The first lens (1) is a positive meniscus lens; the surface of the first lens (1) close to the object plane (O) is a concave surface, and the surface away from the object plane (O) is a convex surface. The second lens group comprises a second front lens (2) and a second rear lens (3); the second front lens (2) is a biconvex positive lens; and the second rear lens (3) is a negative meniscus lens. The third lens group comprises a third front lens (4) and a third rear lens (5); the third front lens (4) is a negative meniscus lens; and the third rear lens (5) is a biconvex positive lens. According to the object-side telecentric lens and the 3D optical endoscope system, the structure is simple, relay imaging of an output image of a two-way endoscope rod mirror can be achieved, alignment and light splitting works are simplified, and the costs are low.
Inventors:
LIU JIANFEI (CN)
HOU HAISHAN (CN)
CHEN AOLU (CN)
XU HONG (CN)
HOU HAISHAN (CN)
CHEN AOLU (CN)
XU HONG (CN)
Application Number:
PCT/CN2022/120364
Publication Date:
June 15, 2023
Filing Date:
September 21, 2022
Export Citation:
Assignee:
NOAHTRON INTELLIGENCE MEDTECH HANGZHOU CO LTD (CN)
International Classes:
G02B23/24; G02B13/00
Foreign References:
| JP2007065524A | 2007-03-15 | |||
| CN111290099A | 2020-06-16 | |||
| CN110361830A | 2019-10-22 | |||
| TW201915538A | 2019-04-16 | |||
| US20210157120A1 | 2021-05-27 |
Attorney, Agent or Firm:
SHINY INTELLECTUAL PROPERTY FIRM (CN)
Download PDF: