Title:
OPTICAL ZOOM SYSTEM, CAMERA MODULE AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/151353
Kind Code:
A1
Abstract:
An optical zoom system (10). The optical zoom system comprises: a first lens group (G1) having negative refractive power and comprising a first lens (L1) and a second lens (L2); a second lens group (G2) having positive refractive power and comprising a third lens (L3), a fourth lens (L4) and a fifth lens (L5); and a third lens group (G3) having negative refractive power and comprising a sixth lens (L6) and a seventh lens (L7). In a zoom process from a short-focus end to a long-focus end, the distance between the first lens group (G1) and the second lens group (G2) is reduced, and the distance between the third lens group (G3) and an imaging surface (S15) is increased; the system satisfies: 0.2 < (R5-R6)/R8 < 3; and R5 is a radius of curvature of an object side surface (S5) of the third lens (L3) at an optical axis, R6 is a radius of curvature of an image side surface (S6) of the third lens (L3) at the optical axis, and R8 is a radius of curvature of an image side surface (S8) of the fourth lens (L4) at the optical axis.
Inventors:
YANG JIAN (CN)
LI MING (CN)
LI MING (CN)
Application Number:
PCT/CN2021/072164
Publication Date:
July 21, 2022
Filing Date:
January 15, 2021
Export Citation:
Assignee:
OFILM GROUP CO LTD (CN)
JIANGXI JINGCHAO OPTICAL CO LTD (CN)
JIANGXI JINGCHAO OPTICAL CO LTD (CN)
International Classes:
G02B15/14; G02B15/177
Foreign References:
| JP2005338598A | 2005-12-08 | |||
| JP2014006275A | 2014-01-16 | |||
| US20020141073A1 | 2002-10-03 | |||
| US5666232A | 1997-09-09 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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