Title:
OPTICAL SYSTEM, LENS MODULE AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/196030
Kind Code:
A1
Abstract:
Disclosed are an optical system, a lens module and an electronic device. The optical system sequentially comprises, from an object side to an image side: a first lens (L1) having a positive refractive power, an object side surface (S1) of the first lens (L1) being a convex surface at an optical axis, and an image side surface (S2) of the first lens (L1) being a concave surface at both the optical axis and the circumference; a second lens (L2) having a refractive power, an object side surface (S3) of the second lens (L2) being a convex surface at the optical axis, and an image side surface (S4) of the second lens (L2) being a concave surface at both the optical axis and the circumference; a third lens (L3), a fourth lens (L4), a fifth lens (L5) and a sixth lens (L6) having a refractive power; and a seventh lens (L7) having a negative refractive power, an image side surface (S14) of the seventh lens (L7) being a concave surface at the optical axis and having at least one inflection point. The optical system satisfies the conditional expression: f/EPD < 1.7. By means of the above configuration, the optical system has a large light incident aperture and thus has a greater light entrance amount, which can improve the photographing effect under dark conditions and has a better imaging effect.
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Inventors:
LIU BINBIN (CN)
LI MING (CN)
ZOU HAIRONG (CN)
LI MING (CN)
ZOU HAIRONG (CN)
Application Number:
PCT/CN2020/082596
Publication Date:
October 07, 2021
Filing Date:
March 31, 2020
Export Citation:
Assignee:
JIANGXI JINGCHAO OPTICAL CO LTD (CN)
International Classes:
G02B13/00
Foreign References:
| CN109358415A | 2019-02-19 | |||
| CN109491051A | 2019-03-19 | |||
| CN109828352A | 2019-05-31 | |||
| CN109828351A | 2019-05-31 | |||
| CN109828357A | 2019-05-31 | |||
| CN109828350A | 2019-05-31 | |||
| CN109839717A | 2019-06-04 | |||
| SU1078393A1 | 1984-03-07 | |||
| SU1432440A1 | 1988-10-23 |
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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