Interferogram stitching method in measuring the form deviation of curved surface with laser interferometry

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• 作者：Pengcheng Yang^a ; ^{pcyang0@gmail.com} ; Yang Liu^a ; Suping Fang^b ; Xindong Zhu^b ; Guangshen Xu^a ; Yuan Xiao^a
• 关键词：Stitching method ; Interferogram ; Surface shape ; Laser interferometry
• 刊名：Optics Communications
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：387
• 期：Complete
• 页码：303-309
• 全文大小：1622 K
• 卷排序：387

文摘

An interferogram stitching method in measuring the form deviation of curved surface with laser interferometry is proposed to improve the measurement accurate. Four steps are included in the method: interferogram registration, reliability recognition, transform model estimation and image resampling. The object surface is regarded as the stitching reference for all interferogram, because there is no available feature which can be detected among different interferograms. The unreliable shape information from dense fringe area will be abandoned, and only the reliable shape information from sparse fringe area will be stitched automatically. The coordinate of any shape information is transformed before the stitching, because the different interferogram has different centers of optical axle.