Patent · US Active

Camera lens assembly comprising four lenses of +−++, ++−+ or +−−+ regractive powers

US11280981B2 · kind B2 · utility

0Cited by

2References

10Claims

0Family size

Assignee

Zhejiang Sunny Optical Co., Ltd · CN

Inventor

Xinquan Wang · Zhejiang, CN

Key dates

Filing date	Jul 19, 2017
Grant date	Mar 22, 2022
Priority date	—
Expiry date	Jan 17, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG02B5/20
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The present disclosure discloses a camera lens assembly, the camera lens assembly having a total effective focal length f and an entrance pupil diameter EPD, and along an optical axis from an object side to an image side sequentially including a first lens, a second lens, a third lens and a fourth lens, wherein the first lens and the fourth lens have positive refractive powers, an image-side surface of the first lens is a concave surface, and an object-side surface of the fourth lens is a convex surface. In addition, the total effective focal length f and the entrance pupil diameter EPD satisfy: f/EPD≤2.

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