Title:
OPTICAL ELEMENT AND OPTICAL SENSOR
Document Type and Number:
WIPO Patent Application WO/2023/100916
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing: an optical element that reflects light of a specific wavelength by utilizing a waveguide-mode resonance phenomenon generated by a liquid crystal diffraction element, the optical element being capable of narrowing the reflection wavelength; and an optical sensor including this optical element. This optical element has a liquid crystal layer formed using a composition that contains a liquid crystal compound. The liquid crystal layer has a liquid crystal alignment pattern in which an optical axis derived from the liquid crystal compound varies its orientation while continuously rotating in at least one in-plane direction. The liquid crystal layer has a resonance structure and is formed by fixing the cholesteric liquid crystalline phase.
Inventors:
SAITOH YUKITO (JP)
HISANAGA KAZUYA (JP)
YANAI YUJIRO (JP)
HISANAGA KAZUYA (JP)
YANAI YUJIRO (JP)
Application Number:
PCT/JP2022/044088
Publication Date:
June 08, 2023
Filing Date:
November 30, 2022
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/18; G01N21/41; G02B5/30; G02F1/13
Domestic Patent References:
| WO2020122128A1 | 2020-06-18 | |||
| WO2020122127A1 | 2020-06-18 |
Foreign References:
| JP2019536101A | 2019-12-12 |
Other References:
YANG ZHIYONG, ZHAN TAO, WU SHIN-TSON: "Polarization independent guided-mode resonance in liquid crystal-based polarization gratings", OSA CONTINUUM, vol. 3, no. 11, 15 November 2020 (2020-11-15), pages 3107, XP093005885, DOI: 10.1364/OSAC.409920
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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