Colorimeter apparatus for color printer ink
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United States of America Patent
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Issued Date -
Mar 27, 2003
app pub date -
Aug 8, 2002
filing date -
Aug 14, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a colorimeter apparatus for a color printer ink capable of rapidly measuring the colors of a color patch portion in an online mode. The light of a xenon light source 21 is directed via an optical fiber 22 and a condenser lens 23 to a zone through which a color patch 53 passes. Reflected light is condensed by a telecentriclens system 14 and focused on the light-receiving surface of a Linear Variable Filter 11. The light is spectrally divided by the Linear Variable Filter 11 and guided toward a linear sensor 13 via a fiber optic plate (FOP) or collimator 12. The output of the linear sensor 13 is converted to an analog signal by an analog signal generator 14 and sent to a signal processor 3. In the signal processor 3, a spectral reflectance factor is calculated based on the resulting spectral reflectivity, and a color or color difference is calculated based on this value and a prestored formula for color systems or color differences.
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