Patent · US Active

Lens assembly comprising five lenses of ++−−+ refractive powers

US11428902B2 · kind B2 · utility

0Cited by

6References

14Claims

0Family size

Assignees

SINTAI OPTICAL (SHENZHEN) CO., LTD. · CN
ASIA OPTICAL CO., INC. · TW

Inventors

Hsi-Ling Chang · Taichung, TW
Guo-Yang Wu · Kaohsiung, TW

Key dates

Filing date	Oct 28, 2019
Grant date	Aug 30, 2022
Priority date	—
Expiry date	Mar 19, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG02B9/60
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens is with positive refractive power and includes a convex surface facing an object side and a concave surface facing an image side. The second lens is with positive refractive power. The third lens is with negative refractive power and includes a convex surface facing the object side. The fourth lens is with negative refractive power and includes a concave surface facing the object side. The fifth lens is with positive refractive power and includes a convex surface facing the image side.

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