OPTICAL REFLECTOR

PROBLEM TO BE SOLVED: To provide an optical reflector which has an excellent electric insulation characteristic and ray reflectivity, is uniform in the optical reflectivity regardless of a sheet position and is excellent in thermal stability at high temp. SOLUTION: This optical reflector consists of...

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Bibliographische Detailangaben
Hauptverfasser:	SENBA KATSUMI, OSHINO FUMIO, ICHIKAWA TARO
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 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 reflector which has an excellent electric insulation characteristic and ray reflectivity, is uniform in the optical reflectivity regardless of a sheet position and is excellent in thermal stability at high temp. SOLUTION: This optical reflector consists of a porous resin sheet obtd. by at least uniformly stretching a sheet contg. 0.01 to 10 pts.wt. stretching assistant per 100 pts.wt. resin compsn. contg. 25 to 40 wt.% polypropylene resin and 75 to 60 wt.% specific inorg. filler. The min. reflectivity at a wavelength 550 nm of this porous resin sheet is specified to >=95%, the difference between the max. reflectivity and the min. reflectivity to