Shearing interferometer using low-coherent light source and calcite prism |
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| Authors: | Shyh-Tsong Lin Kuang-Tsan Lin |
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| Affiliation: | a Department of Electro-optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
b Department of Mechanical and Computer Aided Engineering, St. John’s University, Taipei 25135, Taiwan |
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| Abstract: | A shearing interferometer using a low-coherent light source and calcite prism is proposed in this paper. The calcite prism is the shear plate that generates sheared wavefronts with optical-path difference induced only by the contour of the specimen. Low-coherent light source is thus available while the interferometer is adopted for contour derivative determinations. The design of this interferometer is introduced, a setup constructed to realize the interferometer is described, and the experimental results from the uses of the setup are finally presented. |
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