Improving phase retrieval accuracy of optical parallel plate by adjusting exposure time of CCD. (10th May 2021)

• Record Type: Journal Article
• Authors: Liu, Xu; Liu, Yong; Li, Dong; He, Yuhang; Jiang, Hongzhen; Zhang, Huxiang; Ren, Huan; Chai, Liqun; Zhu, Qihua; Zheng, Wanguo; Tan, Qiaofeng
• Is Part Of: Journal of optics. Volume 23:Number 6(2021)
• Publication Date: 2021-05-10
• Subjects: phase retrieval -- optical parallel plate -- exposure time; Optics -- Periodicals; 535.05
• DOI: 10.1088/2040-8986/abf6bb
• Languages: English
• ISSNs: 2040-8978

Abstract

Abstract: A new phase retrieval method is investigated to reconstruct wavefronts of optical parallel plates with the use of a group of diffraction patterns. More specifically, the improved phase retrieval algorithm is realized by converting the measuring plane wave into a spherical wave and by using single or double discrete Fourier transforms to calculate both far- and near-field diffraction propagations, and the accuracy is improved by adjusting the exposure time of the charge-coupled device according to the distance between the focal plane and diffraction plane. Both the theoretical and experimental results are consistent with the results obtained using conventional wavelength-modulated phase-shifting interferometry. The new method opens new doors for realizing wavefront measurement of optical parallel plates with high accuracy, especially for large-aperture parallel plates in inertial confinement fusion laser systems.