中国激光, 2020, 47 (9): 0904001, 网络出版: 2020-09-16
大视场空间载波数字散斑干涉系统 下载: 868次
Spatial Carrier Digital Speckle Pattern Interferometry System with Large Field of View
测量 数字散斑干涉 空间载波 数字全息干涉 4F光学系统 大视场 变形测量 measurement digital speckle pattern interferometry spatial carrier digital holographic interferometry 4F optical system large field of view deformation measurement
摘要
传统空间载波型数字散斑干涉技术(SC-DSPI)由于光路结构的限制,视场角很小,导致单次测量面积有限。提出一种大视角SC-DSPI光路,在传统SC-DSPI光路基础上增加4F光学系统进行图像传递,使得光路能够应用短焦镜头进行成像,以扩大测量视场角,从而实现大视场测量。实验结果表明,当测量距离为310 mm时,所提大视场SC-DSPI系统能够实现直径为180 mm物体的全场变形测量,且所得到的相位图质量高,测量效果良好。
Abstract
The single measurement area in traditional spatial carrier digital speckle pattern interferometry (SC-DSPI) is limited by its small viewing angle owing to its optical path limitation. In this paper, a SC-DSPI optical path with a large field of view is proposed. A 4F optical system based on the traditional SC-DSPI optical path is added for image transmission, which enables a short-focus lens used in the optical path for imaging to expand the measurement viewing angle, thus realizing a large field of view measurement. The experiment results show that when the measurement distance is 310 mm, the proposed SC-DSPI optical path with a large field of view can realize the entire field deformation measurement of an object with a 180 mm diameter; the obtained phase diagram has high quality. The proposed SC-DSPI facilitates effective measurement.
刘天承, 吴思进, 李伟仙. 大视场空间载波数字散斑干涉系统[J]. 中国激光, 2020, 47(9): 0904001. Liu Tiancheng, Wu Sijin, Li Weixian. Spatial Carrier Digital Speckle Pattern Interferometry System with Large Field of View[J]. Chinese Journal of Lasers, 2020, 47(9): 0904001.