CGH encoding with variable step size search

doi:10.37188/CO.2020-0124

CIOMP OpenIR

	CGH encoding with variable step size search
	H.-W. Qiu; C.-S. Jin; J. Yu; Y. Liu; H.-T. Zhang; L.-P. Wang and S.-Z. Sun
	2021
发表期刊	Chinese Optics
ISSN	20951531
卷号	14 期号:2 页码:368-374
摘要	In the field of aspheric testing, Computer-Generated Hologram (CGH) technology has been widely used. For CGH encoding, when applying the conventional encoding method to achieve highly accurate coding, it will use an amount of data that is often up to tens or even hundreds of GB. Therefore, in order to achieve high encoding accuracy with a small amount of encoded data, we propose a variable step size CGH encoding method. This method first obtains CGH fringe distribution through finding isophase surface, then selects different sampling steps by calculating the phase distribution gradient so that the CGH achieves high precision coding using as few points as possible. Finally, the method was used to CGH encode, then the resulting CGH was manufactured to test an aspheric surface. The test result is 3.142 nm (RMS). In order to verify the credibility of the test results, we design and make a compensator to test the same aspheric surface. The test result is 3.645 nm (RMS). The difference between the two results is 1.291 nm (RMS), and shows that the encoding method can meet the requirements of high-precision testing of aspheric surfaces. Copyright 2021 Chinese Optics. All rights reserved.
DOI	10.37188/CO.2020-0124
URL	查看原文
收录类别	EI
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65090
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	H.-W. Qiu,C.-S. Jin,J. Yu,et al. CGH encoding with variable step size search[J]. Chinese Optics,2021,14(2):368-374.
APA	H.-W. Qiu,C.-S. Jin,J. Yu,Y. Liu,H.-T. Zhang,&L.-P. Wang and S.-Z. Sun.(2021).CGH encoding with variable step size search.Chinese Optics,14(2),368-374.
MLA	H.-W. Qiu,et al."CGH encoding with variable step size search".Chinese Optics 14.2(2021):368-374.

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