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Original reading apparatus, having a filter, for reading a color original

  • US 5,166,784 A
  • Filed: 12/14/1990
  • Issued: 11/24/1992
  • Est. Priority Date: 10/25/1985
  • Status: Expired due to Term
First Claim
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1. An original reading apparatus, including:

  • light source means for illuminating an original;

    color image sensor means for receiving light reflected by the original and outputting signals respectively corresponding to a plurality of types of color information; and

    invisible radiation removing filter means, arranged in an optical path from said light source means to said color image sensor means via the original, for removing long-wavelength invisible radiation, said filter means being provided with a long-wavelength invisible radiation absorption filter and a long-wavelength invisible radiation reflection filter.

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