Abstract

We demonstrate two simple yet efficient all-optical image-processing techniques that use nonlinear photosensitive dye-doped nematic liquid-crystal films, namely, edge enhancement and image addition–subtraction operations. These films require no external bias and function at much lower optical powers and shorter response times than other conventional methods.

© 2001 Optical Society of America

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References

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  1. See, for example, J. Meyer-Arendt, Introduction to Classical and Modern Optics (Prentice-Hall, Englewood Cliffs, N.J., 1989).
  2. C. Egami, Y. Suzuki, T. Uemori, O. Sugihara, and N. Okamoto, Opt. Lett. 22, 1424 (1997).
    [CrossRef]
  3. C. Gorecki and B. Trolard, Opt. Eng. 37, 924 (1998).
    [CrossRef]
  4. J. M. C. Jonathan and M. May, Opt. Eng. 19, 828 (1980).
  5. M. P. Henriot and M. May, Appl. Opt. 20, 2060 (1981).
    [CrossRef] [PubMed]
  6. S. Calixto and R. A. Lessard, Appl. Opt. 24, 773 (1985).
    [CrossRef]
  7. R. A. Lessard, R. Changkakoti, D. Roberge, and G. Manivannan, Proc. SPIE 1806, 2 (1992).
    [CrossRef]
  8. V. P. Pham and R. A. Lessard, Proc. SPIE 2688, 60 (1996).
    [CrossRef]
  9. M. Y. Shih, A. Shishido, P. H. Chen, M. V. Wood, and I. C. Khoo, Opt. Lett. 25, 978 (2000).
    [CrossRef]
  10. I. C. Khoo, M. V. Wood, M. Y. Shih, and P. H. Chen, Opt. Express 14, 431 (1999), http://www.opticsexpress.org .
  11. I. C. Khoo, S. Slussarenko, B. D. Guenther, and W. V. Wood, Opt. Lett. 23, 253 (1998).
    [CrossRef]
  12. I. C. Khoo, P. H. Chen, M. Y. Shih, A. Shishido, and M. V. Wood, Mol. Cryst. Liq. Cryst. 358, 1 (2001).
    [CrossRef]
  13. I. C. Khoo, M. Y. Shih, M. V. Wood, B. D. Guenther, P. H. Chen, F. Simoni, S. S. Slussarenko, O. Francescangeli, and L. Lucchetti, Proc. IEEE 87, 1897 (1999).
    [CrossRef]
  14. I. C. Khoo and S. T. Wu, Liquid Crystals: Physical Properties and Nonlinear Optical Phenomena (Wiley, New York, 1995).

2001 (1)

I. C. Khoo, P. H. Chen, M. Y. Shih, A. Shishido, and M. V. Wood, Mol. Cryst. Liq. Cryst. 358, 1 (2001).
[CrossRef]

2000 (1)

1999 (2)

I. C. Khoo, M. Y. Shih, M. V. Wood, B. D. Guenther, P. H. Chen, F. Simoni, S. S. Slussarenko, O. Francescangeli, and L. Lucchetti, Proc. IEEE 87, 1897 (1999).
[CrossRef]

I. C. Khoo, M. V. Wood, M. Y. Shih, and P. H. Chen, Opt. Express 14, 431 (1999), http://www.opticsexpress.org .

1998 (2)

1997 (1)

1996 (1)

V. P. Pham and R. A. Lessard, Proc. SPIE 2688, 60 (1996).
[CrossRef]

1992 (1)

R. A. Lessard, R. Changkakoti, D. Roberge, and G. Manivannan, Proc. SPIE 1806, 2 (1992).
[CrossRef]

1985 (1)

1981 (1)

1980 (1)

J. M. C. Jonathan and M. May, Opt. Eng. 19, 828 (1980).

Calixto, S.

Changkakoti, R.

R. A. Lessard, R. Changkakoti, D. Roberge, and G. Manivannan, Proc. SPIE 1806, 2 (1992).
[CrossRef]

Chen, P. H.

I. C. Khoo, P. H. Chen, M. Y. Shih, A. Shishido, and M. V. Wood, Mol. Cryst. Liq. Cryst. 358, 1 (2001).
[CrossRef]

M. Y. Shih, A. Shishido, P. H. Chen, M. V. Wood, and I. C. Khoo, Opt. Lett. 25, 978 (2000).
[CrossRef]

I. C. Khoo, M. V. Wood, M. Y. Shih, and P. H. Chen, Opt. Express 14, 431 (1999), http://www.opticsexpress.org .

I. C. Khoo, M. Y. Shih, M. V. Wood, B. D. Guenther, P. H. Chen, F. Simoni, S. S. Slussarenko, O. Francescangeli, and L. Lucchetti, Proc. IEEE 87, 1897 (1999).
[CrossRef]

Egami, C.

Francescangeli, O.

I. C. Khoo, M. Y. Shih, M. V. Wood, B. D. Guenther, P. H. Chen, F. Simoni, S. S. Slussarenko, O. Francescangeli, and L. Lucchetti, Proc. IEEE 87, 1897 (1999).
[CrossRef]

Gorecki, C.

C. Gorecki and B. Trolard, Opt. Eng. 37, 924 (1998).
[CrossRef]

Guenther, B. D.

I. C. Khoo, M. Y. Shih, M. V. Wood, B. D. Guenther, P. H. Chen, F. Simoni, S. S. Slussarenko, O. Francescangeli, and L. Lucchetti, Proc. IEEE 87, 1897 (1999).
[CrossRef]

I. C. Khoo, S. Slussarenko, B. D. Guenther, and W. V. Wood, Opt. Lett. 23, 253 (1998).
[CrossRef]

Henriot, M. P.

Jonathan, J. M. C.

J. M. C. Jonathan and M. May, Opt. Eng. 19, 828 (1980).

Khoo, I. C.

I. C. Khoo, P. H. Chen, M. Y. Shih, A. Shishido, and M. V. Wood, Mol. Cryst. Liq. Cryst. 358, 1 (2001).
[CrossRef]

M. Y. Shih, A. Shishido, P. H. Chen, M. V. Wood, and I. C. Khoo, Opt. Lett. 25, 978 (2000).
[CrossRef]

I. C. Khoo, M. V. Wood, M. Y. Shih, and P. H. Chen, Opt. Express 14, 431 (1999), http://www.opticsexpress.org .

I. C. Khoo, M. Y. Shih, M. V. Wood, B. D. Guenther, P. H. Chen, F. Simoni, S. S. Slussarenko, O. Francescangeli, and L. Lucchetti, Proc. IEEE 87, 1897 (1999).
[CrossRef]

I. C. Khoo, S. Slussarenko, B. D. Guenther, and W. V. Wood, Opt. Lett. 23, 253 (1998).
[CrossRef]

I. C. Khoo and S. T. Wu, Liquid Crystals: Physical Properties and Nonlinear Optical Phenomena (Wiley, New York, 1995).

Lessard, R. A.

V. P. Pham and R. A. Lessard, Proc. SPIE 2688, 60 (1996).
[CrossRef]

R. A. Lessard, R. Changkakoti, D. Roberge, and G. Manivannan, Proc. SPIE 1806, 2 (1992).
[CrossRef]

S. Calixto and R. A. Lessard, Appl. Opt. 24, 773 (1985).
[CrossRef]

Lucchetti, L.

I. C. Khoo, M. Y. Shih, M. V. Wood, B. D. Guenther, P. H. Chen, F. Simoni, S. S. Slussarenko, O. Francescangeli, and L. Lucchetti, Proc. IEEE 87, 1897 (1999).
[CrossRef]

Manivannan, G.

R. A. Lessard, R. Changkakoti, D. Roberge, and G. Manivannan, Proc. SPIE 1806, 2 (1992).
[CrossRef]

May, M.

M. P. Henriot and M. May, Appl. Opt. 20, 2060 (1981).
[CrossRef] [PubMed]

J. M. C. Jonathan and M. May, Opt. Eng. 19, 828 (1980).

Meyer-Arendt, J.

See, for example, J. Meyer-Arendt, Introduction to Classical and Modern Optics (Prentice-Hall, Englewood Cliffs, N.J., 1989).

Okamoto, N.

Pham, V. P.

V. P. Pham and R. A. Lessard, Proc. SPIE 2688, 60 (1996).
[CrossRef]

Roberge, D.

R. A. Lessard, R. Changkakoti, D. Roberge, and G. Manivannan, Proc. SPIE 1806, 2 (1992).
[CrossRef]

Shih, M. Y.

I. C. Khoo, P. H. Chen, M. Y. Shih, A. Shishido, and M. V. Wood, Mol. Cryst. Liq. Cryst. 358, 1 (2001).
[CrossRef]

M. Y. Shih, A. Shishido, P. H. Chen, M. V. Wood, and I. C. Khoo, Opt. Lett. 25, 978 (2000).
[CrossRef]

I. C. Khoo, M. V. Wood, M. Y. Shih, and P. H. Chen, Opt. Express 14, 431 (1999), http://www.opticsexpress.org .

I. C. Khoo, M. Y. Shih, M. V. Wood, B. D. Guenther, P. H. Chen, F. Simoni, S. S. Slussarenko, O. Francescangeli, and L. Lucchetti, Proc. IEEE 87, 1897 (1999).
[CrossRef]

Shishido, A.

I. C. Khoo, P. H. Chen, M. Y. Shih, A. Shishido, and M. V. Wood, Mol. Cryst. Liq. Cryst. 358, 1 (2001).
[CrossRef]

M. Y. Shih, A. Shishido, P. H. Chen, M. V. Wood, and I. C. Khoo, Opt. Lett. 25, 978 (2000).
[CrossRef]

Simoni, F.

I. C. Khoo, M. Y. Shih, M. V. Wood, B. D. Guenther, P. H. Chen, F. Simoni, S. S. Slussarenko, O. Francescangeli, and L. Lucchetti, Proc. IEEE 87, 1897 (1999).
[CrossRef]

Slussarenko, S.

Slussarenko, S. S.

I. C. Khoo, M. Y. Shih, M. V. Wood, B. D. Guenther, P. H. Chen, F. Simoni, S. S. Slussarenko, O. Francescangeli, and L. Lucchetti, Proc. IEEE 87, 1897 (1999).
[CrossRef]

Sugihara, O.

Suzuki, Y.

Trolard, B.

C. Gorecki and B. Trolard, Opt. Eng. 37, 924 (1998).
[CrossRef]

Uemori, T.

Wood, M. V.

I. C. Khoo, P. H. Chen, M. Y. Shih, A. Shishido, and M. V. Wood, Mol. Cryst. Liq. Cryst. 358, 1 (2001).
[CrossRef]

M. Y. Shih, A. Shishido, P. H. Chen, M. V. Wood, and I. C. Khoo, Opt. Lett. 25, 978 (2000).
[CrossRef]

I. C. Khoo, M. V. Wood, M. Y. Shih, and P. H. Chen, Opt. Express 14, 431 (1999), http://www.opticsexpress.org .

I. C. Khoo, M. Y. Shih, M. V. Wood, B. D. Guenther, P. H. Chen, F. Simoni, S. S. Slussarenko, O. Francescangeli, and L. Lucchetti, Proc. IEEE 87, 1897 (1999).
[CrossRef]

Wood, W. V.

Wu, S. T.

I. C. Khoo and S. T. Wu, Liquid Crystals: Physical Properties and Nonlinear Optical Phenomena (Wiley, New York, 1995).

Appl. Opt. (2)

Mol. Cryst. Liq. Cryst. (1)

I. C. Khoo, P. H. Chen, M. Y. Shih, A. Shishido, and M. V. Wood, Mol. Cryst. Liq. Cryst. 358, 1 (2001).
[CrossRef]

Opt. Eng. (2)

C. Gorecki and B. Trolard, Opt. Eng. 37, 924 (1998).
[CrossRef]

J. M. C. Jonathan and M. May, Opt. Eng. 19, 828 (1980).

Opt. Express (1)

I. C. Khoo, M. V. Wood, M. Y. Shih, and P. H. Chen, Opt. Express 14, 431 (1999), http://www.opticsexpress.org .

Opt. Lett. (3)

Proc. IEEE (1)

I. C. Khoo, M. Y. Shih, M. V. Wood, B. D. Guenther, P. H. Chen, F. Simoni, S. S. Slussarenko, O. Francescangeli, and L. Lucchetti, Proc. IEEE 87, 1897 (1999).
[CrossRef]

Proc. SPIE (2)

R. A. Lessard, R. Changkakoti, D. Roberge, and G. Manivannan, Proc. SPIE 1806, 2 (1992).
[CrossRef]

V. P. Pham and R. A. Lessard, Proc. SPIE 2688, 60 (1996).
[CrossRef]

Other (2)

See, for example, J. Meyer-Arendt, Introduction to Classical and Modern Optics (Prentice-Hall, Englewood Cliffs, N.J., 1989).

I. C. Khoo and S. T. Wu, Liquid Crystals: Physical Properties and Nonlinear Optical Phenomena (Wiley, New York, 1995).

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Figures (4)

Fig. 1
Fig. 1

Experimental setup. Inset, planar twisted nematic liquid-crystal film. The NLC sample is situated near the Fourier plane.

Fig. 2
Fig. 2

(a) Input binary image, (b) output image without the secondary polarizer shown in Fig.  1, (c) output image with the polarizer, and (d) output image with a binary high-pass spatial filter.

Fig. 3
Fig. 3

Optical setup for image addition–subtraction. MR, Methyl Red; NLC, nonlinear liquid crystal.

Fig. 4
Fig. 4

(a) Signal A, (b) signal B, and results of (c) image addition and (d) subtraction of two input images.

Equations (1)

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Ib2sin2P-2D-a2sin2D2,

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