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30 April 2024 Research on spatial carrier phase-shifting algorithm and its application in quadri-wave lateral shearing interferometer
Kang Xiao, Xiaojun Chen, Yongqian Wu, Fengwei Liu, Fengtao Yan, Yan Zhao, Yan Xu, Juan Zhang, Xianghai Xiao
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Proceedings Volume 13153, Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Technologies in Optical Systems; 131530S (2024) https://doi.org/10.1117/12.3017256
Event: Sixth Conference on Frontiers in Optical Imaging Technology and Applications (FOI2023), 2023, Nanjing, JS, China
Abstract
In optical systems, the accuracy of the lens is the basis for system performance. To ensure the accuracy of the lens, high-precision detection methods are crucial in lens processing. Commonly used phase-shifting interferometers are susceptible to environmental influences, while the quadriwave lateral shearing interferometer (QWLSI) can solve this problem. QWLSI reconstructs the wavefront from just one interferogram and is becoming increasingly popular owing to its compactness and portability. The most commonly used method to analyze interferograms in QWLSI is the Fourier transform method (FTM), which requires more sophisticated processing and computing time and is erroneous at the edge of the aperture. This study deduces that the spatial carrier phase-shifting (SCPS) algorithm should replace the FTM in QWLSI. Theoretical derivations and simulation results showed that QWLSI works faster and more accurately when the SCPS replaces the FTM.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Kang Xiao, Xiaojun Chen, Yongqian Wu, Fengwei Liu, Fengtao Yan, Yan Zhao, Yan Xu, Juan Zhang, and Xianghai Xiao "Research on spatial carrier phase-shifting algorithm and its application in quadri-wave lateral shearing interferometer", Proc. SPIE 13153, Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Technologies in Optical Systems, 131530S (30 April 2024); https://doi.org/10.1117/12.3017256
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KEYWORDS
Wavefronts
Interferograms
Phase shifts
Fourier transforms
Shearing interferometers
Wavefront reconstruction
Incident light
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