Title:
ZOOM OPTICAL SYSTEM, ENDOSCOPIC OBJECTIVE LENS AND ENDOSCOPE
Document Type and Number:
WIPO Patent Application WO/2024/078300
Kind Code:
A1
Abstract:
The present application relates to a zoom optical system (100) comprising: a first lens group (G1) having a negative optical focus, the first lens group comprising a first lens (L1) having a negative optical focus and a second lens (L2) having a positive optical focus; a second lens group (G2) having a positive optical focus, the second lens group comprising a third lens (L3) and a fourth lens (L4), which are glued together, and the third lens (L3) and the fourth lens (L4) having positively and negatively opposite optical focuses; and a third lens group (G3) having a negative optical focus, the third lens group comprising a fifth lens (L5), a sixth lens (L6), and a seventh lens (L7), the fifth lens (L5) and the sixth lens (L6) being glued together, the fifth lens (L5) and the sixth lens (L6) having positively and negatively opposite optical focuses, and the seventh lens (L7) having a negative optical focus, wherein the second lens group (G2) can move along an optical axis between the first lens group (G1) and the third lens group (G3).
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Inventors:
MA JIAN (CN)
ZHOU XIN (CN)
ZHAO YUAN (CN)
ZHOU XIN (CN)
ZHAO YUAN (CN)
Application Number:
PCT/CN2023/120686
Publication Date:
April 18, 2024
Filing Date:
September 22, 2023
Export Citation:
Assignee:
MICROPORT UROCARE SHANGHAI CO LTD (CN)
International Classes:
G02B15/14; A61B1/00
Foreign References:
| CN218383456U | 2023-01-24 | |||
| JPH0682697A | 1994-03-25 | |||
| JP2006337793A | 2006-12-14 | |||
| KR20220007545A | 2022-01-18 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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