Title:
TRANSMISSIVE LIQUID CRYSTAL DIFFRACTIVE ELEMENT
Document Type and Number:
WIPO Patent Application WO/2021/235416
Kind Code:
A1
Abstract:
Provided is a transmissive liquid crystal diffractive element that can diffract different polarizations in the same direction, and has a high diffraction efficiency. The transmissive liquid crystal diffractive element includes a first optically anisotropic layer and a second optically anisotropic layer, each having a liquid crystal orientation pattern in which the orientation of an optical axis derived from a liquid crystal compound changes while continuously rotating along at least one direction in a plane, wherein a rotation direction of the optical axis in the liquid crystal orientation pattern of the first optically anisotropic layer and a rotation direction of the optical axis in the liquid crystal orientation pattern of the second optically anisotropic layer are opposite to each other, and a single period of the liquid crystal orientation pattern of the first optically anisotropic layer and a single period of the liquid crystal orientation pattern of the second optically anisotropic layer are the same, the single period being a length over which the orientation of the optical axis derived from the liquid crystal compound in the liquid crystal orientation pattern rotates by 180° in the plane.
Inventors:
SAITOH YUKITO (JP)
SATO HIROSHI (JP)
YONEMOTO TAKASHI (JP)
WATANABE JUN (JP)
ICHIHASHI MITSUYOSHI (JP)
KODAMA KEISUKE (JP)
SATO HIROSHI (JP)
YONEMOTO TAKASHI (JP)
WATANABE JUN (JP)
ICHIHASHI MITSUYOSHI (JP)
KODAMA KEISUKE (JP)
Application Number:
PCT/JP2021/018693
Publication Date:
November 25, 2021
Filing Date:
May 18, 2021
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/18; G02B5/30
Domestic Patent References:
| WO2020075711A1 | 2020-04-16 | |||
| WO2019221294A1 | 2019-11-21 |
Foreign References:
| JP2014089476A | 2014-05-15 |
Attorney, Agent or Firm:
NAKASHIMA Junko et al. (JP)
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