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Proceedings Paper

Liquid crystal hologram for cylinder lens measurement
Author(s): Yao Hu; Shaopu Wang; Zhen Wang; Wanlong Zhang; Qun Hao
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Paper Abstract

We propose a liquid crystal (LC) hologram fabricated with photoalignment technology, for the measurement of a cylindrical surface. A standard cylindrical surface reflects the incident planar wavefront and generates an interferogram with a planar reference wavefront. Photoalignment azo-dye material is then exposed by the interferogram and aligned with desired orientations, following with depositing LC monomer to generate the designed phase information. After ultra-violet curing, the fabricated LC hologram plate can generate a standard cylindrical wavefront when illuminated with a planar wavefront. The minimal line-width due to the limitation of LC molecules is sub-microns, which is smaller than the limitation in traditional CGH. The systematic design of the measurement is proposed, followed by a demonstration simulation.

Paper Details

Date Published: 19 November 2019
PDF: 4 pages
Proc. SPIE 11185, Optical Design and Testing IX, 111850W (19 November 2019); doi: 10.1117/12.2536599
Show Author Affiliations
Yao Hu, Beijing Institute of Technology (China)
Shaopu Wang, Beijing Institute of Spacecraft Environment Engineering (China)
China Aerospace Science and Technology Corp. (China)
Zhen Wang, Beijing Institute of Technology (China)
Wanlong Zhang, Hong Kong Univ. of Science and Technology (China)
Qun Hao, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 11185:
Optical Design and Testing IX
Yongtian Wang; Pablo Benítez; Osamu Matoba, Editor(s)

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