RETARDATION FILM

PROBLEM TO BE SOLVED: To provide an optical film such as a polycarbonate resin and a retardation film that has a small photoelastic coefficient for suppressing image irregularity, has superior heat resistance and can exert wavelength dispersion characteristics of negative phase difference despite a...

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Bibliographische Detailangaben
Hauptverfasser:	KUSAKA HARUHIKO, ENDO JUN, TANAKA TOMOHIKO, HIRAMI YUICHI, AKEDA MINAKO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON 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 FREQUENCY-CHANGING GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an optical film such as a polycarbonate resin and a retardation film that has a small photoelastic coefficient for suppressing image irregularity, has superior heat resistance and can exert wavelength dispersion characteristics of negative phase difference despite a single film.SOLUTION: The polycarbonate resin is prepared using a diol component including an aromatic diol compound represented by the following general formula (1). The retardation film is obtained by acquiring a sheet or a film from the polycarbonate resin by melt extrusion method and drawing it at least in one direction. (In the formula, Aand Arepresent arbitrary bivalent groups including no aromatic ring structure, and X represents any one of a methylene group, a carbonyl group, and a direct coupling.)