LIQUID CRYSTAL COMPOSITION, LIQUID CRYSTAL OPTICAL ELEMENT AND OPTICAL PICKUP DEVICE

PROBLEM TO BE SOLVED: To provide a liquid crystal composition for a high-density optical disk using a blue laser beam having high Δn, and having high light resistance to the blue laser beam. SOLUTION: The liquid crystal composition has ≤320 nm maximum absorption wave length, and ≥10 GΩcm initial val...

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Bibliographische Detailangaben
Hauptverfasser:	HASEGAWA MAKOTO, KUMAI YUTAKA, KAIDA YURIKO
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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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a liquid crystal composition for a high-density optical disk using a blue laser beam having high Δn, and having high light resistance to the blue laser beam. SOLUTION: The liquid crystal composition has ≤320 nm maximum absorption wave length, and ≥10 GΩcm initial value of the specific resistance of a liquid crystal layer in a liquid crystal element. Especially the liquid crystal composition contains ≥90 wt.% of one or more kinds of compounds represented by general formula (1): R1-Cy-Ph-Ph-(Ph)n-R2(1) (wherein, R1is a 1-12C alkyl group; R2is a fluorine atom or a 1-12C alkyl group; Cy is a trans-1,4-cyclohexylene group; Ph is a 1,4-phenylene group; n is 0 or 1; at least one hydrogen atom of at least one 1,4-phenylene group at 2-, 3-, 5- or 6-position is substituted with a fluorine atom). COPYRIGHT: (C)2008,JPO&INPIT