LENS DEVICE

WIPO Patent Application WO/2024/029309

A1

The present invention provides a lens device small in size and capable of variably changing the focal length. Each of first and second liquid crystal layers has a circular center part and a plurality of annular parts, the first and second liquid crystal layers can rotate relative to each other, the first and second liquid crystal layers have the same inner diameter and outer diameter of the annular parts which are n-th in order from the center part, and when vortex a pattern in which, in polar coordinates of r and φ, a direction θ1 of an optical axis in a region where φ is φ1 satisfies a relationship given by an expression 3: {α1×φ1+θ0n1}-3°<θ1<{α1×φ1+θ0n1}+3° (where θ0n1 is the direction of the optical axis at φ1=0° for the center part and each annular part) is a vortex orientation pattern, the center part of the first liquid crystal layer has a vortex orientation pattern in which α1=m×0.5, the n-th annular part of the first liquid crystal layer has a vortex orientation pattern in which α1=(m+n)×0.5, the center part of the second liquid crystal layer has a vortex orientation pattern in which α2=-(m×0.5), and the n-th annular part of the second liquid crystal layer has a vortex orientation pattern in which α2=-(m+n)×0.5.

WO/2018/057982	STOP STRUCTURE FOR OPTICAL MODULE
WO/2023/141738	LIQUID CRYSTAL LENS, DRIVING METHOD, GLASSES, ELECTRONIC PRODUCT, AND VR/AR DEVICE

YANAI YUJIRO (JP)

PCT/JP2023/025918

February 08, 2024

July 13, 2023

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FUJIFILM CORP (JP)

G02B3/14; B32B7/023; G02B5/30; G02B27/02

JP2019203983A	2019-11-28
JP2010533895A	2010-10-28
JPS62129815A	1987-06-12
JP2008233903A	2008-10-02
JP2023078789A	2023-06-07

ITOH Hideaki et al. (JP)

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