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US09448456B2 Tunable liquid crystal optical device 有权
可调式液晶光学器件

Tunable liquid crystal optical device
Abstract:
A liquid crystal optical device has a layered structure with split liquid crystal layers having alignment surfaces that define in a liquid crystal material pre-tilt angles of opposite signs. Four liquid crystal layers can provide two directions of linear polarization. In the case of a lens, the device can be a gradient index lens, and the alignment surfaces can have a spatially uniform pre-tilt.
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