Optical element employing liquid crystal having optical isotropy
First Claim
1. An optical element comprising:
- a pair of transparent substrates disposed so as to be opposed to each other;
a liquid crystal disposed between the pair of transparent substrates and having optical isotropy; and
transparent electrodes formed between the liquid crystal and the transparent substrates, for applying a voltage to the liquid crystal;
wherein the refractive index of the liquid crystal changes depending on the voltage applied via the electrodes.
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Abstract
An optical element is provided, which can realize high speed response equivalent or more than that of conventional elements without depending on incident polarization.
A diffraction element 10 comprises transparent substrates 5 and 6, a grating 2A made of an isotropic refractive index solid material formed on the transparent substrate 5 and having a cross-sectional structure having a periodical concavo-convex shape, a blue phase liquid crystal 2B which fills the concave portions of grating 2A including a periodical concave-convex shape having a refractive index which changes isotropically, and transparent electrodes 3 and 4 for applying voltage to the blue phase liquid crystal 2B, wherein the grating 2A and the blue phase liquid crystal 2B constitutes a diffraction grating 1, and the diffraction element 10 has a construction that the refractive index of the blue phase liquid crystal 2B is changed by the voltage applied via the transparent electrodes 3 and 4.
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Citations
14 Claims
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1. An optical element comprising:
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a pair of transparent substrates disposed so as to be opposed to each other;
a liquid crystal disposed between the pair of transparent substrates and having optical isotropy; and
transparent electrodes formed between the liquid crystal and the transparent substrates, for applying a voltage to the liquid crystal;
wherein the refractive index of the liquid crystal changes depending on the voltage applied via the electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification