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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 18, Iss. 20 — Oct. 15, 1993
  • pp: 1745–1747

Time-multiplexed optical Hadamard image transforms with ferroelectric-liquid-crystal-over-silicon spatial light modulators

J. Gourlay, P. McOwan, D. G. Vass, I. Underwood, and M. Worboys  »View Author Affiliations


Optics Letters, Vol. 18, Issue 20, pp. 1745-1747 (1993)
http://dx.doi.org/10.1364/OL.18.001745


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Abstract

The Hadamard transform is an example of a matrix transform that allows images to be represented in terms of orthogonal basis functions with binary-valued matrix elements. Such basis functions can be displayed on binary amplitude modulating ferroelectric-liquid-crystal-over-silicon spatial light modulators, permitting novel, real-time, and high-speed implementation of the transform on incoherently illuminated input scenes. An example of an optical Hadamard transform performed in real time by using a spatial light modulator is described. To show the validity of this optical decomposition, we electronically reconstruct the transformation data for comparison with the original input scene.

© 1993 Optical Society of America

History
Original Manuscript: May 18, 1993
Published: October 15, 1993

Citation
J. Gourlay, I. Underwood, M. Worboys, P. McOwan, and D. G. Vass, "Time-multiplexed optical Hadamard image transforms with ferroelectric-liquid-crystal-over-silicon spatial light modulators," Opt. Lett. 18, 1745-1747 (1993)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-18-20-1745


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References

  1. T. S. Huang, ed., Picture Processing and Digital Filtering (Springer-Verlag, Berlin, 1979), Chap. 2, pp. 21–67.
  2. J. Gourlay, P. McOwan, D. G. Vass, I. Underwood, M. Worboys, in Spatial Light Modulators and Applications, Vol. 6 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), pp. 100–103.
  3. M. Harwit, N. J. Sloane, Hadamard Transform Optics (Academic, New York, 1979), Chap. 2, pp. 20–61.
  4. I. Underwood, D. G. Vass, R. M. Sillitto, Proc. Inst. Electr. Eng. Part J 133, 77 (1986).
  5. K. M. Johnson, D. J. McKnight, I. Underwood, IEEE J. Quantum Electron. 29, 699 (1993). [CrossRef]
  6. N. Collings, W. A. Crossland, P. J. Ayliff, D. G. Vass, I. Underwood, Appl. Opt. 28, 4740 (1989). [CrossRef] [PubMed]
  7. J. Gourlay, P. McOwan, D. G. Vass, I. Underwood, M. Worboys, in Proceedings of the Conference on Applied Optics and Opto-electronics (Institute of Physics, Bristol, UK, 1992), pp. 211–213.

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