ANAMORPHIC LENS - GUANGDONG SIRUI OPTICAL CO LTD

Title:

ANAMORPHIC LENS

Document Type and Number:

WIPO Patent Application WO/2021/056523

Kind Code:

A1

Abstract:

An anamorphic lens comprises an anamorphic set (11) consisting of cylindrical lenses and an imaging set (12) consisting of spherical lenses, and the anamorphic set (11) and the imaging set (12) are sequentially provided from an object space to an image space. The anamorphic set (11) comprises a first lens (1), a second lens (2), and a third lens (3) sequentially provided from the object space to the image space. The second lens (2) and the third lens (3) are adhered to each other. The first lens (1) is a biconcave cylindrical lens having negative focal power. The second lens (2) is a cylindrical lens having negative focal power. The third lens (3) is a cylindrical lens having positive focal power. The optical properties of the cylindrical lenses constituting the anamorphic set (11) result in a "compression" of incoming horizontal rays of light, but do not change rays of light entering in a vertical field of view. The subsequent imaging set (12) performs comprehensive correction on the rays, such that an angle of a horizontal field of view increases by 33%, thereby achieving 1.33X anamorphic capture. In addition, the lens is small, lightweight, and cheap, and meets requirements of most common users.

Inventors:

LI JIE (CN)
WU WEI (CN)
LI WULIN (CN)

Application Number:

PCT/CN2019/108977

Publication Date:

April 01, 2021

Filing Date:

September 29, 2019

Export Citation:

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Assignee:

GUANGDONG SIRUI OPTICAL CO LTD (CN)

International Classes:

G02B13/08; G02B3/06

Domestic Patent References:

WO2016094842A1	2016-06-16
WO2016094842A1	2016-06-16

Foreign References:

CN108700799A	2018-10-23
CN108700799A	2018-10-23
US5930050A	1999-07-27
US5930050A	1999-07-27
CN102540413A	2012-07-04
CN102540413A	2012-07-04
CN107479173A	2017-12-15

Other References: