Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1997-01-09
1998-09-15
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250234, 25022711, 358484, 362 16, 362800, H04N 104, H01L 27146
Patent
active
058082956
ABSTRACT:
Illumination device, image apparatus using the device and information processing system using the apparatus for illuminating a light beam emitted from at least two light emitting elements of different light emission wavelength ranges to an original through a light conductor prevent irregularity of illumination on the original without providing compensation means to attain improvement in color discrimination ability of a color document sheet read signal without increasing a cost. A light beam applied from an illumination device 30 arranged at an end of a light conductor 3 is scattered and reflected by a scatter and reflection area 5 of the light conductor to illuminate the original 100. The illumination device 30 at least two light emitting elements 81G and 81R of different light emission wavelength ranges and centers of the light emitting elements are arranged at positions spaced from a normal line passing through a center of the scatter and reflection area 5.
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Kaifu Noriyuki
Kobayashi Isao
Mizutani Hidemasa
Takeda Shinichi
Canon Kabushiki Kaisha
Lee John R.
Westin Edward P.
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