Patent · US Active

Optical system, camera module and electronic device

US12332409B2 · kind B2 · utility

0Cited by

9References

19Claims

0Family size

Assignee

JIANGXI JINGCHAO OPTICAL CO., LTD. · CN

Inventors

Jinhua Zou · Nanchang, CN
Binbin Liu · Beijing, CN
Ming Li · Ningbo City, CN

Key dates

Filing date	Nov 29, 2019
Grant date	Jun 17, 2025
Priority date	—
Expiry date	Feb 15, 2042

Classification

Technology area (CPC G)Physics
CPC primaryG02B13/18
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Disclosed is an optical system (10) sequentially comprising, from an object side to an image side, a first lens (L1) having a positive refraction power, a second lens (L2), a third lens (L3) and a fourth lens (L4). An image side surface (S8) of the fourth lens (L4) is a concave surface on an optical axis, both an object side surface (S7) and the image side surface (S8) of the fourth lens (L4) are aspheric surfaces, and at least one of the object side surface (S7) and the image side surface (S8) of the fourth lens (L4) has a point of inflexion. The optical system (10) comprises a stop (STO), the stop (STO) being arranged between the object side of the first lens (L1) and the fourth lens (L4), and the optical system (10) satisfies: 0.5<SL/TTL<0.9, and −1<SAG31/CT3<0.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.