CELLULOSE ESTER FILM

PROBLEM TO BE SOLVED: To provide a cellulose ester film excellent in optical isotropy, particularly in optical isotropy in a direction of film thickness, and to provide a method for producing the cellulose ester film, a polarizing plate for a display device, and the display device.SOLUTION: A cellul...

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Hauptverfasser: KANEKO TADAHIRO, MURAKAMI TAKASHI
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creator KANEKO TADAHIRO
MURAKAMI TAKASHI
description PROBLEM TO BE SOLVED: To provide a cellulose ester film excellent in optical isotropy, particularly in optical isotropy in a direction of film thickness, and to provide a method for producing the cellulose ester film, a polarizing plate for a display device, and the display device.SOLUTION: A cellulose ester film has planar orientation degree S represented by a following formula (I) of 0.0004 or less, and has retardation Rt in a direction of film thickness of less than 10 nm. The formula (I) is S=(Nx+Ny)/2-Nz, Rt=((Nx+Ny)/2-Nz)*d. In this formula, Nx represents a refractive index in a slow axis direction in a cellulose ester film plane, Ny represents a refractive index in a film plane in a direction perpendicular to the slow axis direction, Nz represents a refractive index in a thickness direction of the film, and d represents film thickness (nm) of the cellulose ester film.
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The formula (I) is S=(Nx+Ny)/2-Nz, Rt=((Nx+Ny)/2-Nz)*d. 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subjects 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
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
title CELLULOSE ESTER FILM
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