Patent · US Active

Lens assembly

US10409033B2 · kind B2 · utility

2Cited by

1References

20Claims

0Family size

Assignees

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

Inventors

Chien-Hung Chen · Taipei, TW
Hsi-Ling Chang · Taichung, TW

Key dates

Filing date	Nov 27, 2017
Grant date	Sep 10, 2019
Priority date	—
Expiry date	Nov 27, 2037

Classification

Technology area (CPC G)Physics
CPC primaryG02B13/004
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A lens assembly includes a first lens, a second lens, a third lens, and a fourth lens, wherein the first lens, the second lens, the third lens, and the fourth lens are arranged in order from an object side to an image side along an optical axis. The first lens is with positive refractive power. The second lens is with negative refractive power. The third lens is with refractive power. The fourth lens is with negative refractive power. The lens assembly satisfies: 0.2<D4/TTL<0.6, wherein D4 is an effective diameter of the fourth lens and TTL is an interval from an object side surface of the first lens to an image plane along the optical axis.

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