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Chinese Optics Letters, Vol. 17, Issue 5, 052201 (2019)

Optical–digital joint design of refractive telescope using chromatic priors

Jingang Zhang1,2, Yunfeng Nie3,*, Qiang Fu4, and Yifan Peng5

Author Affiliations

  • 1Key Laboratory of Computational Optics Imaging Technology, Chinese Academy of Sciences, Beijing 100094, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, Beijing
  • 3Brussel Photonics, Department of Applied Physics and Photonics, Vrije Universiteit Brussel, 1050 Ixelles, Belgium
  • 4King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
  • 5The University of British Columbia, Vancouver V6T 1Z4, Canada

Abstract

The conventional optical system design employs combinations of different lenses to combat aberrations, which usually leads to considerable volume and weight. In this Letter, a tailored design scheme that exploits state-of-the-art digital aberration correction algorithms in addition to traditional optics design is investigated. In particular, the proposed method is applied to the design of refractive telescopes by shifting the burden of correcting chromatic aberrations to software. By enforcing cross-channel information transfer in a post-processing step, the uncorrected chromatic aberrations are well-mitigated. Accordingly, a telescope of F-8, 1400 mm focal length, and 0.14° field of view is designed with only two lens elements. The image quality of the designed telescope is evaluated by comparing it to the equivalent designs with multiple lenses in a traditional optical design manner, which validates the effectiveness of our design scheme.