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Proceedings Paper

Coherent imaging by using defocus grating
Author(s): Haotong Ma; Zongliang Xie; Bo Qi; Guowen Zhang; Ge Ren; Sanhong Wang
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Paper Abstract

We propose and demonstrate an coherent imaging technique by using defocus grating. For the imaging system, the defocus grating combined with lens with short focal length is used to realize multiplane imaging on the lens' focal plane, simultaneously. Based on these multiplane images, Gerchberg-Saxton (GS) algorithm is used to reconstruct the complex amplitude distribution of the input imaging beam. By using computational imaging and digital wavefront distortion correction with stochastic parallel gradient descent (SPGD) algorithm, this technology can be used for joint estimation of both pupil aberrations and an high resolution image of the object, successfully.

Paper Details

Date Published: 25 October 2016
PDF: 8 pages
Proc. SPIE 9992, Emerging Imaging and Sensing Technologies, 99920I (25 October 2016); doi: 10.1117/12.2242019
Show Author Affiliations
Haotong Ma, Institute of Optics and Electronics (China)
Key Lab. of Optical Engineering (China)
National Univ. of Defense Technology (China)
Zongliang Xie, Institute of Optics and Electronics (China)
Key Lab. of Optical Engineering (China)
Bo Qi, Institute of Optics and Electronics (China)
Key Lab. of Optical Engineering (China)
Guowen Zhang, Shanghai Institute of Optics and Fine Mechanics (China)
Ge Ren, Institute of Optics and Electronics (China)
Key Lab. of Optical Engineering (China)
Sanhong Wang, Taiyuan Satellite Launch Ctr. (China)


Published in SPIE Proceedings Vol. 9992:
Emerging Imaging and Sensing Technologies
Keith L. Lewis; Richard C. Hollins, Editor(s)

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