Common-path and synchronous phase shifting of lateral shearing interferometry based on micro-polarizer array

Zhu, Yahui; Tian, Anmin; Liu, Bingcai; Wang, Hongjun; Wang, Kai; Wang, Siqi

doi:10.1117/12.2624043

Cited by 2 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This system not only enables the measurement of surface shape and roughness but also enables the detection of large-aperture surfaces using a sub-aperture stitching technique based on structural optimization. In 2022, Our team [6] proposed the application of micro-polarization arrays as phase-shifting devices in a multi-directional lateral shearing interferometry system to achieve high-precision measurements of aspherical optical elements.…”

Section: Introductionmentioning

confidence: 99%

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

Wang

Tian

Xu³

et al. 2023

International Conference on Optical and Photonic Engineering (icOPEN 2022)

View full text Add to dashboard Cite

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 threechannel 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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

Wang

Tian

Xu³

et al. 2023

International Conference on Optical and Photonic Engineering (icOPEN 2022)

View full text Add to dashboard Cite

show abstract

“…The function of the polarizer array was to generate varying phase shifts for different regions of a CCD. Siqi Wang et al [23] proposed a common-path and synchronous phase-shifting of lateral shearing interferometry which also needed a micropolarizer array for phase shifting. These additional optical elements require specific design, which is difficult to obtain.…”

Section: Introductionmentioning

confidence: 99%

Synchronous Phase-Shifting Interference for High Precision Phase Imaging of Objects Using Common Optics

Zhao

Liu

Tianhe

et al. 2023

Sensors

View full text Add to dashboard Cite

Quantitative phase imaging and measurement of surface topography and fluid dynamics for objects, especially for moving objects, is critical in various fields. Although effective, existing synchronous phase-shifting methods may introduce additional phase changes in the light field due to differences in optical paths or need specific optics to implement synchronous phase-shifting, such as the beamsplitter with additional anti-reflective coating and a micro-polarizer array. Therefore, we propose a synchronous phase-shifting method based on the Mach–Zehnder interferometer to tackle these issues in existing methods. The proposed method uses common optics to simultaneously acquire four phase-shifted digital holograms with equal optical paths for object and reference waves. Therefore, it can be used to reconstruct the phase distribution of static and dynamic objects with high precision and high resolution. In the experiment, the theoretical resolution of the proposed system was 1.064 µm while the actual resolution could achieve 1.381 µm, which was confirmed by measuring a phase-only resolution chart. Besides, the dynamic phase imaging of a moving standard object was completed to verify the proposed system’s effectiveness. The experimental results show that our proposed method is suitable and promising in dynamic phase imaging and measurement of moving objects using phase-shifting digital holography.

show abstract

Common-path and synchronous phase shifting of lateral shearing interferometry based on micro-polarizer array

Cited by 2 publications

References 5 publications

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

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

Synchronous Phase-Shifting Interference for High Precision Phase Imaging of Objects Using Common Optics

Contact Info

Product

Resources

About