Chinese Journal of Lasers, Volume. 47, Issue 9, 904001(2020)
Spatial Carrier Digital Speckle Pattern Interferometry System with Large Field of View
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.
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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): 904001
Category: Measurement and metrology
Received: Mar. 11, 2020
Accepted: --
Published Online: Sep. 16, 2020
The Author Email: Sijin Wu (swu@bistu.edu.cn)