Abstract

A new and inexpensive holographic technique for measuring the phase errors of a two-dimensional spatial light modulator (SLM) is described, and experimental verification is provided. A new technique to correct spatial phase errors in any SLM is then detailed and experimentally demonstrated. This technique is employed for the Radio Shack liquid-crystal television SLM, and a shift-invariant correlator is obtained. Additional low-pass filtering techniques (appropriate for any SLM with a fixed pattern of modulating cells) are discussed that provide improved contrast and achieve proper correlations.

© 1986 Optical Society of America

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References

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  1. S. Morozumi, K. Oguchi, H. Ohshima, Opt. Eng. 23, 241 (1984).
  2. H. K. Liu, J. Davis, R. Lilly, Opt. Lett. 10, 635 (1985).
    [CrossRef] [PubMed]
  3. J. Davis, R. A. Lilly, K. D. Krenz, H. K. Liu, Proc. Soc. Photo-Opt. Instrum. Eng.613 (to be published, 1986).

1985 (1)

1984 (1)

S. Morozumi, K. Oguchi, H. Ohshima, Opt. Eng. 23, 241 (1984).

Davis, J.

H. K. Liu, J. Davis, R. Lilly, Opt. Lett. 10, 635 (1985).
[CrossRef] [PubMed]

J. Davis, R. A. Lilly, K. D. Krenz, H. K. Liu, Proc. Soc. Photo-Opt. Instrum. Eng.613 (to be published, 1986).

Krenz, K. D.

J. Davis, R. A. Lilly, K. D. Krenz, H. K. Liu, Proc. Soc. Photo-Opt. Instrum. Eng.613 (to be published, 1986).

Lilly, R.

Lilly, R. A.

J. Davis, R. A. Lilly, K. D. Krenz, H. K. Liu, Proc. Soc. Photo-Opt. Instrum. Eng.613 (to be published, 1986).

Liu, H. K.

H. K. Liu, J. Davis, R. Lilly, Opt. Lett. 10, 635 (1985).
[CrossRef] [PubMed]

J. Davis, R. A. Lilly, K. D. Krenz, H. K. Liu, Proc. Soc. Photo-Opt. Instrum. Eng.613 (to be published, 1986).

Morozumi, S.

S. Morozumi, K. Oguchi, H. Ohshima, Opt. Eng. 23, 241 (1984).

Oguchi, K.

S. Morozumi, K. Oguchi, H. Ohshima, Opt. Eng. 23, 241 (1984).

Ohshima, H.

S. Morozumi, K. Oguchi, H. Ohshima, Opt. Eng. 23, 241 (1984).

Opt. Eng. (1)

S. Morozumi, K. Oguchi, H. Ohshima, Opt. Eng. 23, 241 (1984).

Opt. Lett. (1)

Other (1)

J. Davis, R. A. Lilly, K. D. Krenz, H. K. Liu, Proc. Soc. Photo-Opt. Instrum. Eng.613 (to be published, 1986).

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Figures (7)

Fig. 1
Fig. 1

Output image of a vertical bar on the LC TV with a two-lens imaging system: (a) with no filter present; (b) with only the zero order passed.

Fig. 2
Fig. 2

Output image of Chinese characters: (a) with no filter present; (b) with only the zero order passed.

Fig. 3
Fig. 3

Holographic phase-distortion measurement system.

Fig. 4
Fig. 4

Interference pattern at P3 of Fig. 3: (a) without the LC TV; (b) with the LC TV in the system; (c) with the polarizer in the system.

Fig. 5
Fig. 5

Optical system for (a) synthesis and (b) use of the phase-conjugate hologram H1 to correct LC TV distortions.

Fig. 6
Fig. 6

Optical frequency plane correlator using the LC TV and the phase-conjugate hologram H1.

Fig. 7
Fig. 7

(a) Input image to the LC TV. (b) The P3 correlation plane pattern with a MSF of the letter X placed at P2.

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