Coherent imaging by using defocus grating

Haotong Ma; Zongliang Xie; Bo Qi; Guowen Zhang; Ge Ren; Sanhong Wang

doi:10.1117/12.2242019

25 October 2016 Coherent imaging by using defocus grating

Haotong Ma, Zongliang Xie, Bo Qi, Guowen Zhang, Ge Ren, Sanhong Wang

Proceedings Volume 9992, Emerging Imaging and Sensing Technologies; 99920I (2016) https://doi.org/10.1117/12.2242019
Event: SPIE Security + Defence, 2016, Edinburgh, United Kingdom

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.

Conference Presentation

Citation Download Citation

Haotong Ma, Zongliang Xie, Bo Qi, Guowen Zhang, Ge Ren, and Sanhong Wang "Coherent imaging by using defocus grating", Proc. SPIE 9992, Emerging Imaging and Sensing Technologies, 99920I (25 October 2016); https://doi.org/10.1117/12.2242019

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