Adam SPGD algorithm in freeform surface in-process interferometry

The adaptive interferometer has been recently proposed to realize the metrology of unknown freeform surfaces with several restructured algorithms for feedback control. The adaptive moment estimation (Adam) stochastic parallel gradient descent (SPGD) algorithm is employed in this paper for fringes re...

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Bibliographic Details
Published in:	Optics express Vol. 30; no. 18; p. 32528
Main Authors:	Wu, Jinling, Hu, Chengwen, Liu, Renhu, Wu, Shengyang, Cao, Jiaquan, Cheng, Zhongtao, Yu, Benli, Zhang, Lei
Format:	Journal Article
Language:	English
Published:	29.08.2022
ISSN:	1094-4087, 1094-4087
Online Access:	Get full text
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Summary:	The adaptive interferometer has been recently proposed to realize the metrology of unknown freeform surfaces with several restructured algorithms for feedback control. The adaptive moment estimation (Adam) stochastic parallel gradient descent (SPGD) algorithm is employed in this paper for fringes release. The proposed algorithm makes considerable progress in relieving conflict of the convergence rate, speed, and parameters intervention. Simulations and experiments show its 37% time saving and 99% convergence rate, with arbitrarily configured parameter increment, compared with the SPGD algorithm. It would have great potential in in-process tests in freeform surface fabrication or large-volume testing.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1094-4087 1094-4087
DOI:	10.1364/OE.470007