Patent · US Active

Projection lens

US11714266B2 · kind B2 · utility

0Cited by

22References

21Claims

0Family size

Assignee

Zhejiang Sunny Optical Co., Ltd · CN

Inventors

Xinquan Wang · Zhejiang, CN
Lin Huang · 丈亭镇, CN

Key dates

Filing date	Nov 8, 2018
Grant date	Aug 1, 2023
Priority date	—
Expiry date	Oct 5, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG03B21/145
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The disclosure discloses a projection lens, which sequentially includes a first lens, a second lens and a third lens from an image source side to an imaging side along an optical axis. The first lens has a positive refractive power, and a surface near the image source side thereof is a convex surface. The second lens has a positive refractive power or negative refractive power. The third lens has a positive refractive power is a meniscus lens of which a surface near the imaging side is a convex surface. An image source height ImgH of the projection lens and a total effective focal length f of the projection lens meet ImgH/f<0.2.

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