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Proceedings Paper

Study on preparation process of high diffraction efficiency liquid crystal computer generated hologram
Author(s): Zhen Wang; Yao Hu; Wanlong Zhang; Shihang Fu; Qun Hao; Yu Zhang
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Paper Abstract

Computer-generated hologram (CGH) method is a high-precision aspherical surface detection method. CGH produces wavefronts of any shape with extremely high precision and is adopted in null test. Liquid crystal CGH (LC-CGH) is a new type of CGH with short production cycle and low cost. It is a promising alternative to traditional CGH. In this paper, the overall process flow of LC grating preparation is presented. The influences of three process parameters, such as LC solution concentration, spin coating speed and time on the three physical quantities of LC grating diffraction efficiency, LC polymer film thickness and phase delay are studied. Based on the analysis, improvement measures are proposed for the preparation process. The research carried out in this paper has guiding significance for the processing and manufacturing of LC-CGH.

Paper Details

Date Published: 12 March 2020
PDF: 8 pages
Proc. SPIE 11434, 2019 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 114341J (12 March 2020); doi: 10.1117/12.2550272
Show Author Affiliations
Zhen Wang, Beijing Institute of Technology (China)
Yao Hu, Beijing Institute of Technology (China)
Wanlong Zhang, Hong Kong Univ. of Science and Technology (Hong Kong, China)
Shihang Fu, Beijing Institute of Technology (China)
Qun Hao, Beijing Institute of Technology (China)
Yu Zhang, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 11434:
2019 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Juan Liu; Baohua Jia; Xincheng Yao; Yongtian Wang; Takanori Nomura, Editor(s)

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