POLYMERIZABLE LIQUID CRYSTALLINE COMPOSITION, OPTICALLY ANISOTROPIC MATERIAL, OPTICAL ELEMENT, AND OPTICAL HEAD DEVICE

PROBLEM TO BE SOLVED: To provide a polymerizable liquid crystalline composition and an optically anisotropic material which are excellent in light resistance, to provide an optical element which is excellent in light resistance, and to provide an optical head device using the optical element. SOLUTI...

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Bibliographische Detailangaben
Hauptverfasser:	HASEGAWA MAKOTO, KUMAI YUTAKA, OKADA SATOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY 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 MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PAINTS PHYSICS POLISHES TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a polymerizable liquid crystalline composition and an optically anisotropic material which are excellent in light resistance, to provide an optical element which is excellent in light resistance, and to provide an optical head device using the optical element. SOLUTION: The polymerizable liquid crystalline composition includes a compound represented by CH2=CX1-COO-L1-B1-A1-B2-Cy-Cy-B3-A2-B4-L2-OCO-CX2=CH2of 15-60 mass%, a compound represented by CH2=CX3-COO-L3-B5-A3-B6-Cy-B7-A4-B8-R1of 15-30 mass%, and a compound represented by CH2=CX4-COO-L4-B9-Cy-B10-Cy-B11-R2of 25-55 mass%. As a diffraction grating 2 fabricated by using the composition is excellent in lightfastness, it can form an optical head device suitable for increase in capacity by using a blue laser beam as a light source 1. COPYRIGHT: (C)2010,JPO&INPIT