Continuously electronically controlled linear polarization rotator
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United States of America Patent
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Feb 21, 2023
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app pub date -
Apr 12, 2022
filing date -
Apr 12, 2022
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Abstract
A continuously electronically controlled linear polarization rotator includes a first liquid crystal cell having a first upper substrate, a first lower substrate, and a transparent liquid crystal layer disposed between the first upper substrate and the first lower substrate; and a second liquid crystal cell having a second upper substrate, a second lower substrate, and a transparent liquid crystal layer disposed between the second upper substrate and second lower substrate. The first and second liquid crystal cells satisfy a condition that dΔn/λ is in a range of 1.2 to 1.8, wherein λ is a wavelength of incident light traveling through the first and second liquid crystal cells, d is thickness of the transparent liquid crystal layer, Δn is birefringence of the transparent liquid crystal layer. The first and second liquid crystal cells are applied by voltage to make a linear polarization angle of outgoing light continuously rotate.
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