COLOUR VALUE MEASUREMENT

Korea, Republic of Patent

PATENT NO 880001359
APP PUB NO KR-840006696-A
SERIAL NO

830004657

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Abstract

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Light from e.g. a halogen lamp (2) is guided through a fibre (3) to an annular distributor (4) directing a conical or convergent beam (20, 21) through a window (23) on to the sample (22). The reflected light is detected by e.g. a Si photovoltaic cell (5). The light beam is chopped periodically by a disc (6) which is rotated by a motor (28) and comprises an open quadrant, a black reference quadrant and two colour reference quadrants comparable with the sample (22). The ratio of the intensities of reflections from the black and colour references is subtracted (16) from that of reflections from the sample and colour reference.

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Patent Owner(s)

Patent OwnerAddress
NESTLE SACHAVENUE NESTLE 55 1800 VEVEY SWITZERLAND

International Classification(s)

Inventor(s)

Inventor Name Address
AKMAN ROBERT CABI CH
SIMOND REMY CH-1814 LA TOUR-DE-PEILZ
SPRENGER ARTHUR CH-1806 SAINT-LEGIER

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