LIQUID CRYSTAL DIFFRACTION ELEMENT, OPTICAL ELEMENT, IMAGE DISPLAY UNIT, HEAD-MOUNTED DISPLAY, BEAM STEERING, AND SENSOR

Provided are a liquid crystal diffraction element having a small angle dependence of diffraction efficiency and excellent heat resistance, and a liquid crystal diffraction element, an optical element, an image display unit, a head-mounted display, a beam steering, and a sensor that include the liqui...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	INAGAKI, Harue, KATOH, Shunya
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES ANALOGOUS ARRANGEMENTS USING OTHER WAVES CHEMISTRY DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DYES FREQUENCY-CHANGING LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE MEASURING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PAINTS PHYSICS POLISHES RADIO DIRECTION-FINDING RADIO NAVIGATION TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TESTING
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Beschreibung
Zusammenfassung:	Provided are a liquid crystal diffraction element having a small angle dependence of diffraction efficiency and excellent heat resistance, and a liquid crystal diffraction element, an optical element, an image display unit, a head-mounted display, a beam steering, and a sensor that include the liquid crystal diffraction element. A liquid crystal diffraction element according to the present invention includes an optically-anisotropic layer that is formed of a liquid crystal composition including a polymerizable liquid crystal compound, in which the polymerizable liquid crystal compound includes at least one monofunctional polymerizable liquid crystal compound having one polymerizable group, the optically-anisotropic layer has a liquid crystal alignment pattern in which an orientation of an optical axis derived from the monofunctional polymerizable liquid crystal compound changes while continuously rotating in at least one in-plane direction, and in an infrared absorbance spectrum where a measurement sample obtained by powdering the optically-anisotropic layer is measured by Fourier transform infrared spectroscopy, an area ratio of a specific peak satisfies a predetermined relational expression.