Three-channel micro-polarization array simultaneous phase-shifted interferometry method

Siqi Wang; Ailing Tian; Xu Jiang; Bingcai Liu; Hongjun Wang; Xuelinag Zhu; Yahui Zhu; Kai Wang; Kexin Ren

doi:10.1117/12.2666533

27 January 2023 Three-channel micro-polarization array simultaneous phase-shifted interferometry method

Siqi Wang, Ailing Tian, Xu Jiang, Bingcai Liu, Hongjun Wang, Xuelinag Zhu, Yahui Zhu, Kai Wang, Kexin Ren

Proceedings Volume 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022); 125500D (2023) https://doi.org/10.1117/12.2666533
Event: International Conference on Optical and Photonic Engineering (icOPEN 2022), 2022, ONLINE, China

Abstract

Polarization cameras integrated with conventional four-channel Micro-Polarization Arrays (MPA) are usually used as phase shift devices in focal plane-type interferometric systems to achieve simultaneous phase shifts. However, such phase shift devices suffer from low sampling rates and a lack of mature resolution reconstruction techniques to resolve pixel-level alignment errors. To solve such problems and further improve the phase reconstruction accuracy of the focal plane interferometric system, this paper proposes to apply the "Bayer-like" three-channel MPA to the interferometric system to realize the simultaneous phase shift. The arrangement of the three-channel MPA can reduce the processing complexity of the element and improve the inter-channel sampling rate. In addition, this structure can better utilize the resolution reconstruction idea of Color Filter Array (CFA) to solve the inherent pixel-level alignment error problem between simultaneous phase shift interferograms. Taking lateral shearing interferometry as an example, the process of acquiring simultaneous phase-shifted interferograms and phase reconstruction in an interferometric system with three-channel MPA is verified by simulation. The experiment results shows that the proposed three-channel MPA structure performs better than the traditional four-channel MPA structure in terms of visual reconstruction effect and quantitative index of phase reconstruction.

Citation Download Citation

Siqi Wang, Ailing Tian, Xu Jiang, Bingcai Liu, Hongjun Wang, Xuelinag Zhu, Yahui Zhu, Kai Wang, and Kexin Ren "Three-channel micro-polarization array simultaneous phase-shifted interferometry method", Proc. SPIE 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022), 125500D (27 January 2023); https://doi.org/10.1117/12.2666533

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KEYWORDS

Phase shifts

Interferograms

Interpolation

Phase interferometry

Phase reconstruction

Reconstruction algorithms

Interferometry

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