Optical phase filter using liquid crystal
First Claim
Patent Images
1. An optical phase filter comprising:
- a liquid crystal layer; and
a transparent electrode for applying an electric field to said liquid crystal layer, said transparent electrode having a plurality of openings distributed at random.
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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.
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6 Claims
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1. An optical phase filter comprising:
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a liquid crystal layer; and a transparent electrode for applying an electric field to said liquid crystal layer, said transparent electrode having a plurality of openings distributed at random. - View Dependent Claims (2)
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3. An optical phase filter comprising:
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a liquid crystal layer first and second transparent electrodes for applying an electric field to said liquid crystal layer, said first and second transparent electrodes having a plurality of openings distributed at random, the openings of said first transparent electrode being different in size from the openings of said second transparent electrode; and means for selectively actuating one of said first and said second transparent electrodes. - View Dependent Claims (4, 5, 6)
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Specification