A fast point-cloud computing method based on spatial symmetry of Fresnel field

Xiangxiang Wang; Kai Zhang; Chuan Shen; Wenliang Zhu; Sui Wei

doi:10.1117/12.2285501

24 October 2017 A fast point-cloud computing method based on spatial symmetry of Fresnel field

Xiangxiang Wang, Kai Zhang, Chuan Shen, Wenliang Zhu, Sui Wei

Proceedings Volume 10461, AOPC 2017: Optical Spectroscopy and Imaging; 104611H (2017) https://doi.org/10.1117/12.2285501
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China

Abstract

Aiming at the great challenge for Computer Generated Hologram (CGH) duo to the production of high spatial-bandwidth product (SBP) is required in the real-time holographic video display systems. The paper is based on point-cloud method and it takes advantage of the propagating reversibility of Fresnel diffraction in the propagating direction and the fringe pattern of a point source, known as Gabor zone plate has spatial symmetry, so it can be used as a basis for fast calculation of diffraction field in CGH. A fast Fresnel CGH method based on the novel look-up table (N-LUT) method is proposed, the principle fringe patterns (PFPs) at the virtual plane is pre-calculated by the acceleration algorithm and be stored. Secondly, the Fresnel diffraction fringe pattern at dummy plane can be obtained. Finally, the Fresnel propagation from dummy plan to hologram plane. The simulation experiments and optical experiments based on Liquid Crystal On Silicon (LCOS) is setup to demonstrate the validity of the proposed method under the premise of ensuring the quality of 3D reconstruction，the method proposed in the paper can be applied to shorten the computational time and improve computational efficiency.

Citation Download Citation

Xiangxiang Wang, Kai Zhang, Chuan Shen, Wenliang Zhu, and Sui Wei "A fast point-cloud computing method based on spatial symmetry of Fresnel field", Proc. SPIE 10461, AOPC 2017: Optical Spectroscopy and Imaging, 104611H (24 October 2017); https://doi.org/10.1117/12.2285501

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