Abstract

The optical sparse aperture (OSA) imaging technique is capable of improving the spatial resolution of a telescope while maintaining lower size, weight, and cost. The majority of OSA system researches separately focus on the design optimization of aperture layout and the method for image restoration, which have great design redundancy. In this Letter, an end-to-end design framework that simultaneously optimizes the aperture layout parameters of the OSA system and neural network parameters of image restoration is proposed, which achieves excellent imaging quality. The results show that adequate image mid-frequency information captured by the OSA system benefits network processing more than incomplete high-frequency information in a few directions. Based on this framework, we design a simplified OSA system on geostationary orbit. The simulation results show that our simplified OSA system with six sub-apertures measuring 1.2m each has a comparable imaging performance to a single-aperture system measuring 12 m.

© 2023 Optica Publishing Group

Single-shot image restoration via a model-enhanced network with unpaired supervision in an optical sparse aperture system

Ju Tang, Jiawei Zhang, Zhenbo Ren, Jianglei Di, Xiaoyan Wu, and Jianlin Zhao
Opt. Lett. 48(18) 4849-4852 (2023)

Optimal sparse apertures for phased-array imaging

F. Cassaing and L. M. Mugnier
Opt. Lett. 43(19) 4655-4658 (2018)

End-to-end learned single lens design using improved Wiener deconvolution

Rongshuai Zhang, Fanjiao Tan, Qingyu Hou, Zongling Li, Zaiwu Sun, Changjian Yang, and Xiangyang Gao
Opt. Lett. 48(3) 522-525 (2023)

Deblur or denoise: the role of an aperture in lens and neural network co-design

M. Dufraisse, P. Trouvé-Peloux, J.-B. Volatier, and F. Champagnat
Opt. Lett. 48(2) 231-234 (2023)

Generalized aberration regularization in the single-lens computational imaging system design

Zongling Li, Fanjiao Tan, Rongshuai Zhang, Zaiwu Sun, Changjian Yang, and Qingyu Hou
Opt. Lett. 48(20) 5439-5442 (2023)