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Optical operation apparatus for effecting parallel signal processing by detecting light transmitted through a filter in the form of a matrix

  • US 4,815,027 A
  • Filed: 09/23/1987
  • Issued: 03/21/1989
  • Est. Priority Date: 04/13/1984
  • Status: Expired due to Term
First Claim
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1. An optical operation apparatus for effecting the following operation:

  • ##EQU3## (n and m are integers each at least equal to

         2), said apparatus comprising;

    a plurality of light sources arranged in a predetermined direction and emitting light of respective intensities corresponding to said S1, S2, . . . , Sm, respectively;

    an optical filter in which m×

    n portions having transmission factors corresponding to absolute values of said a11, . . . , anm are arranged in the form of a matrix, said portions having transmission factors corresponding to the absolute values of said a1i, a2i, . . . , ani and receiving the light from the one of said light sources emitting light of intensity corresponding to said Si (i=1, . . . , m), respectively;

    a plurality of photoelectric converting units arranged in a direction perpendicular to said predetermined direction for receiving the light beams transmitted through said optical filter and converting said light, beams, into electrical signals corresponding to said S1 '"'"', S2 '"'"', . . . , Sn '"'"', at least one of said units having at least a first light receiving portion for detecting the light transmitted through at least one said portion corresponding to at least one of said a11, . . . , anm which has a positive value, at least a second light-receiving portion for detecting the light transmitted through at least one said portion corresponding to at least one of said a11, . . . , anm which has a negative value, and means for subtracting the signal detected by said second light-receiving portion from that detected by said first light-receiving portion.

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