Variable lateral shearing Sagnac interferometer with dove prism

Lulu Cheng; Qiaoqin Chen; Guo Xia; Shiqun Jin; Nu Zhang

doi:10.1117/12.2572941

5 November 2020 Variable lateral shearing Sagnac interferometer with dove prism

Lulu Cheng, Qiaoqin Chen, Guo Xia, Shiqun Jin, Nu Zhang

Proceedings Volume 11566, AOPC 2020: Optical Spectroscopy and Imaging; and Biomedical Optics; 1156603 (2020) https://doi.org/10.1117/12.2572941
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

Sagnac interferometer is an important structure of lateral shearing interferometer. The shearing distance of the interferometer affects the measurement sensitivity of the interferometer and the stripe density of the fringes. A Sagnac interferometer with dove prism with variable lateral shearing distance is proposed. A dove prism is placed in the traditional optical path between the two mirrors in the Sagnac interferometer. The shearing distance of the interferometer can be adjusted by rotating the dove prism continuously. This structure can get the shearing distance over a wide range and reduce the influence of vibration on the system in the Sagnac interferometer during adjustment. The availability of this interferometer was confirmed after simulation and experiment.

Citation Download Citation

Lulu Cheng, Qiaoqin Chen, Guo Xia, Shiqun Jin, and Nu Zhang "Variable lateral shearing Sagnac interferometer with dove prism", Proc. SPIE 11566, AOPC 2020: Optical Spectroscopy and Imaging; and Biomedical Optics, 1156603 (5 November 2020); https://doi.org/10.1117/12.2572941

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