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This paper presents a novel method based on projection moiré technique for the visualization and quantitative evaluation of full-field density and temperature variations. The basic principles and components for the operation of this optical system are discussed. The proposed setup is characterized by its simplicity inexpensiveness and its versatility. Furthermore it can handle large observation areas.
Ming Wang,Li Ma,Jing-gen Zeng,Qi-Xian Cheng, andChuan Kang Pan
"Projection moiré deflectometry for mapping phase objects", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.57493
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Ming Wang, Li Ma, Jing-gen Zeng, Qi-Xian Cheng, Chuan Kang Pan, "Projection moire deflectometry for mapping phase objects," Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.57493