Color sorting apparatus for granular object with optical detection device consisting of CCD linear sensor
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United States of America Patent
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Aug 31, 2004
Grant Date -
May 29, 2003
app pub date -
Nov 7, 2002
filing date -
Nov 9, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical detection device for use in a color sorting apparatus for granular objects includes a CCD linear sensor. The CCD linear sensor comprises a plurality of light receiving elements arranged in one row each of which is capable of detecting red, green and blue wavelengths. The CCD linear sensor receives light from a granular object and a background which are irradiated by a red light source, a green light source and a blue light source. The red, green and blue light sources are switched over while the granular object is passing within an optical detection area. The CCD linear sensor receives light from the granular object in synchronization with the above switching operation of the light sources.
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