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大视场空间载波数字散斑干涉系统

Spatial Carrier Digital Speckle Pattern Interferometry System with Large Field of View

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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.

广告组1 - 空间光调制器+DMD
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中图分类号:O436

DOI:10.3788/CJL202047.0904001

所属栏目:测量与计量

基金项目:国家自然科学基金;

收稿日期:2020-03-11

修改稿日期:2020-04-15

网络出版日期:2020-09-01

作者单位    点击查看

刘天承:北京信息科技大学仪器科学与光电工程学院, 北京 100192
吴思进:北京信息科技大学仪器科学与光电工程学院, 北京 100192
李伟仙:北京信息科技大学仪器科学与光电工程学院, 北京 100192

联系人作者:吴思进(swu@bistu.edu.cn)

备注:国家自然科学基金;

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引用该论文

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

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

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