Abstract

A simple method to measure the thickness uniformity of liquid crystal layer is presented. The measurement results of a liquid crystal spatial light modulator (LCSLM) and a liquid crystal television (LCTV) are demonstrated, which show the measurement method is practicable.

© 1997 Optical Society of America

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References

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  1. D. Malacara, Optical Shop Testing (John Wiley & Sons Inc., New York, N.Y., 1978), pp. 1–42.
  2. J. Grinberg et al., “A new real-time non-coherent to coherent light image converter—the hybrid field effect liquid crystal light valve,” Opt. Eng. 14, 217–225 (1975).
    [CrossRef]
  3. Y. Li et al., “Research and developments of several SLMs,” SPIE 2778, 977–978(1996).
  4. M. Born, E. Wolf, Principle of Optics (Pergamon Press Inc., New York, N.Y., 1980), pp. 694–702.
  5. A. Miyaji et al., “Control and elimination of disclinations in twisted nematic liquid crystal display,” IEEE Trans. Electron. Devices ED-24, 811–815 (1977).
    [CrossRef]
  6. A. Yariv, P. Yeh, Optical Waves in Crystals (John Wiley & Sons Inc., New York, N.Y., 1984), pp. 69–120.

1996 (1)

Y. Li et al., “Research and developments of several SLMs,” SPIE 2778, 977–978(1996).

1977 (1)

A. Miyaji et al., “Control and elimination of disclinations in twisted nematic liquid crystal display,” IEEE Trans. Electron. Devices ED-24, 811–815 (1977).
[CrossRef]

1975 (1)

J. Grinberg et al., “A new real-time non-coherent to coherent light image converter—the hybrid field effect liquid crystal light valve,” Opt. Eng. 14, 217–225 (1975).
[CrossRef]

Born, M.

M. Born, E. Wolf, Principle of Optics (Pergamon Press Inc., New York, N.Y., 1980), pp. 694–702.

Grinberg, J.

J. Grinberg et al., “A new real-time non-coherent to coherent light image converter—the hybrid field effect liquid crystal light valve,” Opt. Eng. 14, 217–225 (1975).
[CrossRef]

Li, Y.

Y. Li et al., “Research and developments of several SLMs,” SPIE 2778, 977–978(1996).

Malacara, D.

D. Malacara, Optical Shop Testing (John Wiley & Sons Inc., New York, N.Y., 1978), pp. 1–42.

Miyaji, A.

A. Miyaji et al., “Control and elimination of disclinations in twisted nematic liquid crystal display,” IEEE Trans. Electron. Devices ED-24, 811–815 (1977).
[CrossRef]

Wolf, E.

M. Born, E. Wolf, Principle of Optics (Pergamon Press Inc., New York, N.Y., 1980), pp. 694–702.

Yariv, A.

A. Yariv, P. Yeh, Optical Waves in Crystals (John Wiley & Sons Inc., New York, N.Y., 1984), pp. 69–120.

Yeh, P.

A. Yariv, P. Yeh, Optical Waves in Crystals (John Wiley & Sons Inc., New York, N.Y., 1984), pp. 69–120.

IEEE Trans. Electron. Devices (1)

A. Miyaji et al., “Control and elimination of disclinations in twisted nematic liquid crystal display,” IEEE Trans. Electron. Devices ED-24, 811–815 (1977).
[CrossRef]

Opt. Eng. (1)

J. Grinberg et al., “A new real-time non-coherent to coherent light image converter—the hybrid field effect liquid crystal light valve,” Opt. Eng. 14, 217–225 (1975).
[CrossRef]

SPIE (1)

Y. Li et al., “Research and developments of several SLMs,” SPIE 2778, 977–978(1996).

Other (3)

M. Born, E. Wolf, Principle of Optics (Pergamon Press Inc., New York, N.Y., 1980), pp. 694–702.

A. Yariv, P. Yeh, Optical Waves in Crystals (John Wiley & Sons Inc., New York, N.Y., 1984), pp. 69–120.

D. Malacara, Optical Shop Testing (John Wiley & Sons Inc., New York, N.Y., 1978), pp. 1–42.

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Figures (3)

Figure 1
Figure 1

Experimental setup for measuring the liquid crystal layer uniformity.

Figure 2
Figure 2

The measurement results of an LCSLM made in our laboratory—4.5 interference fringes in Figure 2a, and one fringe in Figure 2b after adjusting the four grabs.

Figure 3
Figure 3

The measurement result of an LCTV, there are 1.5 fringes in the interference pattern.

Equations (4)

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I x ,   y = I 1 + I 2 + [ 2 I 1   I 2 1 / 2 ] cos δ x ,   y
δ x ,   y = 2 π / λ n o - n e d x ,   y .
I x ,   y = I o sin 2 [ δ x ,   y / 2 ]
n e α = n o n e [ 1 + t g 2 α / n o 2 + n e 2 t g 2 α ] 1 / 2

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