Invention Grant
- Patent Title: Switchable liquid crystal fresnel lens
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Application No.: US14452190Application Date: 2014-08-05
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Publication No.: US09933685B2Publication Date: 2018-04-03
- Inventor: Abhishek Kumar Srivastava , Xiaoqian Wang , Vladimir Grigorievich Chigrinov , Hoi-Sing Kwok
- Applicant: The Hong Kong University of Science and Technology
- Applicant Address: CN Hong Kong
- Assignee: The Hong Kong University of Science and Technology
- Current Assignee: The Hong Kong University of Science and Technology
- Current Assignee Address: CN Hong Kong
- Agency: Leydig, Voit & Mayer, Ltd.
- Main IPC: G02F1/141
- IPC: G02F1/141 ; G02F1/29 ; G02F1/1337 ; G02F1/1335

Abstract:
A liquid crystal Fresnel lens is provided. The liquid crystal Fresnel lens includes a liquid crystal cell and two polarizers. The liquid crystal cell includes: two transparent substrates having conducting layers disposed thereon with alignment layers, wherein an alignment pattern formed by the alignment layers are configured to provide multiple alignment domains in a Fresnel zones pattern, and wherein an easy axis of adjacent alignment domains are oriented at an angle relative to one another; and a ferroelectric liquid crystal layer disposed between the two transparent substrates, wherein the ferroelectric liquid crystal layer has a planar surface orientation and smectic layers perpendicular to the two transparent substrates. The liquid crystal cell is disposed between the two polarizers.
Public/Granted literature
- US20150036084A1 SWITCHABLE LIQUID CRYSTAL FRESNEL LENS Public/Granted day:2015-02-05
Information query
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