Title:
OPTICAL SYSTEM, LENS MODULE, AND TERMINAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/134801
Kind Code:
A1
Abstract:
Disclosed are an optical system (10), a lens module (20), and a terminal device (30). The optical system (10) comprises, from an object side to an image side in an optical axis direction, a first lens (L1) with a negative refractive power; a second lens (L2) with a negative refractive power; a third lens (L3) with a positive refractive power; a fourth lens (L4) with a negative refractive power, with an object-side face (S7) of the fourth lens (L4) near the optical axis being a convex face, and an image-side face (S8) of the fourth lens (L4) near the optical axis being a concave face; and a fifth lens (L5) with a positive refractive power, with an image-side face (S10) of the fifth lens (L5) near the optical axis being a convex face, wherein the image-side face (S8) of the fourth lens (L4) is fitted to an object-side face (S9) of the fifth lens (L5), and the optical system (10) satisfies the following conditional expression: 4 ＜ TTL/(ImgH * 2) ＜ 6, where TTL is the distance, on the optical axis, from an object-side face (S1) of the first lens (L1) to an imaging face (S15) of the optical system (10), and ImgH is the half image height of the optical system (10) in a horizontal direction. The ratio of the face types of the first lens (L1) to the fifth lens (L5) to the refractive power and the ratio of TTL/(ImgH * 2) are rationally configured, such that the optical system (10) has an imaging effect with a wide viewing angle and a high imaging resolution, and system aberration correction is facilitated.
Inventors:
LE YUMING (CN)
CAI XIONGYU (CN)
LAN BINLI (CN)
ZHOU RUI (CN)
CAI XIONGYU (CN)
LAN BINLI (CN)
ZHOU RUI (CN)
Application Number:
PCT/CN2020/070353
Publication Date:
July 08, 2021
Filing Date:
January 03, 2020
Export Citation:
Assignee:
TIANJIN OFILM OPTO ELECTRONICS CO LTD (CN)
International Classes:
G02B13/00; G02B13/06; G02B13/18
Foreign References:
| CN202230237U | 2012-05-23 | |||
| CN106468818A | 2017-03-01 | |||
| CN109212714A | 2019-01-15 | |||
| CN205880339U | 2017-01-11 | |||
| JP2019179155A | 2019-10-17 |
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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