Optical phase filter using liquid crystal

Details Optical phase filter using liquid crystal Optical phase filter using liquid crystal

1984-06-01

1986-08-19

Corbin, John K.

350331R, 350347R, 350347V, G02F 113

Patent

active

046066128

ABSTRACT:
An optical phase filter includes a liquid crystal layer whose configuration changes between the homogeneous and homeotropic configurations depending upon whether or not an electric field is applied thereacross. A pair of transparent electrodes apply the electric field to the liquid crystal layer. At least one of the transparent electrodes is provided with a great number of holes distributed at random over its entire surface, whereby the optical performance and particularly the MTF value of the light passing through the liquid crystal layer due to the double-refracting property of the liquid crystal layer is made variable.

REFERENCES:
patent: 4023890 (1977-05-01), Shirasu et al.
patent: 4137524 (1979-01-01), Chen et al.
patent: 4200361 (1980-04-01), Malvano et al.
patent: 4277786 (1981-07-01), Waldron

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