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Title:
OPTICAL ELEMENT
Document Type and Number:
WIPO Patent Application WO/2024/038894
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an optical element with which the utilization efficiency of spectral light can be improved. The problem is solved by having a liquid crystal diffraction element and a prism having a first surface that is in contact with the liquid crystal diffraction element directly or via another layer, wherein: the liquid crystal diffraction element includes an optically anisotropic layer having a liquid crystal alignment pattern in which the direction of an optical axis derived from a liquid crystal compound is changing while continuously rotating along at least one direction in a plane; and the prism has a second surface that reflects one of light beams separated due to the diffraction by the liquid crystal diffraction element.

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Inventors:
SAITOH YUKITO (JP)
YANAI YUJIRO (JP)
HISANAGA KAZUYA (JP)
Application Number:
PCT/JP2023/029708
Publication Date:
February 22, 2024
Filing Date:
August 17, 2023
Export Citation:
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Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/30; G01J3/18; G01J3/447; G02B5/00; G02B5/04; G02B5/18
Domestic Patent References:
WO2021132630A12021-07-01
WO2019111800A12019-06-13
WO2021235416A12021-11-25
WO2008142723A22008-11-27
Foreign References:
JP2020512584A2020-04-23
US20170003169A12017-01-05
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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