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Applied Optics

Applied Optics


  • Vol. 9, Iss. 9 — Sep. 1, 1970
  • pp: 2161–2168

Matrix Multiplication by Optical Methods

R. A. Heinz, J. O. Artman, and S. H. Lee  »View Author Affiliations

Applied Optics, Vol. 9, Issue 9, pp. 2161-2168 (1970)

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The utilization of coherent optical correlation techniques in the performance of matrix multiplication by optical analog methods has been investigated mathematically. Although the basic concepts have been known for some time, we have not been able to find explicit analyses in the existing literature. Since many correlations other than those corresponding to the desired matrix multiplication terms exist, methods of isolating the desired from the undesired terms are presented. Various spatial configurations for both the input and output arrays are discussed. For the special cases of 2 × 2 matrices the analyses are presented in greater detail. Using simple circ function distributions, the effects of finite-sized array elements and detector apertures are investigated.

© 1970 Optical Society of America

Original Manuscript: January 19, 1970
Published: September 1, 1970

R. A. Heinz, J. O. Artman, and S. H. Lee, "Matrix Multiplication by Optical Methods," Appl. Opt. 9, 2161-2168 (1970)

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  1. The following texts serve as general references for this material: J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, San Francisco, 1968); A. Papoulis, Systems and Transforms with Applications in Optics (McGraw-Hill, New York, 1968); A. Papoulis, The Fourier Integral and its Applications (McGraw-Hill, New York, 1962). Matrix multiplication is mentioned briefly on pp. 97 and 98 of the article by L. J. Cutrona, in Optical and Electrooptical Information Processing, J. T. Tippett et al., Eds. (Mass. Inst. of Technol. Press, Cambridge, 1965).
  2. This condition on y1and ŷ1is the most general and may be over-restrictive in any particular example. For any case where the order of the matrices is not infinity much less severe restrictions are imposed. For example, for 2 × 2 and 3 × 3 matrices we require only y1≠ ŷ1.
  3. Analyses equivalent to some of this material can be found, for example, on pp. 116–120 of Goodman (Ref. 1) and on pp. 32–35 of Papoulis (Systems and Transforms with Applications in Optics).
  4. C. B. Burckhardt, J. Opt. Soc. Amer. 59, 1544A (1969).

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