Phase Unwrapping Algorithms Based on Fast Fourier Transform

Zhihui, 张志会 Zhang; Huaying, 王华英 Wang; Zuoqiang, 刘佐强 Liu; Min, 黄敏 Huang; Feifei, 刘飞飞 Liu; Mengjie, 于梦杰 Yu; Baoqun, 赵宝群 Zhao

doi:10.3788/lop49.120902

Cited by 2 publications

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“…In the early stage, the single Fourier transform algorithm is widely used, and this algorithm can reproduce the pixel size and the reproduction distance. Now based on the Fast Fourier Transform convolution, angular and Fresnel methods for phase unwrap and numerical compensation for a lot of improvements [6][7].…”

Section: Introductionmentioning

confidence: 99%

Research on Digital Holographic 3D Reconstruction Software

Tian

2018

International Journal of Advanced Network, Monitoring and Controls

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Digital holography has a wide range of applications in displaying the surface morphology of three-dimensional objects. There have been many studies on the physical methods and implementation methods of digital holography. One of the main problems at present is to design a stable and fast reconfiguration software. This paper analyzes the basic principle of convolution based off-axis digital holographic reconstruction, and presents the process of 3D reconstruction of off-axis digital holography. The 3D reconstruction software of digital holography is designed and developed according to the basic principle and the process of reconstruction, and the parallel operation of 3D reconstruction is realized by OpenMP. Results show that the software can help researchers conveniently realize digital holographic three-dimensional reconstruction. The reconstructed parameters can be adjusted according to the requirements, and the spectra, intensity maps, phase maps and other information required in the reconstruction process can be obtained. The software meets the needs of digital three-dimensional reconstruction.

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Section: Introductionmentioning

confidence: 99%

Research on Digital Holographic 3D Reconstruction Software

Tian

2018

International Journal of Advanced Network, Monitoring and Controls

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Research on Phase Detection of Liquid Crystal Optical Device

Shi¹,

Yang²,

Yang³

et al. 2014

JAMP

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The technology for phase detection of liquid crystal optical device is a difficult research in current domestic and overseas. However, for the existing liquid crystal optical device, aiming at the poor anti-vibration capability and poor versatile of phase detection, the complexity of phase retrieval algorithm, we propose a new phase measurement principle and experimental methods of liquid crystal optical device. It is a phase measurement method based on the combination of phaseshifting interferometer and phase conjugation technology. The deflection characteristics of the liquid crystal device means the device can implement phase modulation to only one direction of polarized light while is completely transparent to orthogonal polarized light. We put forward the phase shift of the orthogonal polarization phase shift interferometer method, using phase shifting interference as well as the combination of phase conjugate means to achieve its phase measurement. So we can retrieves devices modulation phase simply and efficiently combines with phaseshifting interferometer technology.

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Phase Unwrapping Algorithms Based on Fast Fourier Transform

Cited by 2 publications

References 0 publications

Research on Digital Holographic 3D Reconstruction Software

Research on Digital Holographic 3D Reconstruction Software

Research on Phase Detection of Liquid Crystal Optical Device

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