Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Design of a Light and Small Dual-band Airborne Despun Optical System

  • Luqing Zhang (College of Optoelectronic Engineering, Changchun University of Science and Technology) ;
  • Ning Zhang (College of Optoelectronic Engineering, Changchun University of Science and Technology) ;
  • Xiping Xu (College of Optoelectronic Engineering, Changchun University of Science and Technology) ;
  • Kailin Zhang (College of Optoelectronic Engineering, Changchun University of Science and Technology) ;
  • Yue Zhang (College of Optoelectronic Engineering, Changchun University of Science and Technology) ;
  • Jiachong Li (College of Optoelectronic Engineering, Changchun University of Science and Technology)
  • Received : 2023.10.11
  • Accepted : 2023.01.03
  • Published : 2024.02.25
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Abstract

In aerial cameras, image quality is easily affected by weather, temperature, and the attitude of the aircraft. Aiming at this phenomenon, based on the theory of two-step zoom optical systems, a dual-band optical-despun two-step zoom optical system is designed. The system has a small field of view of 2.00° × 1.60°, and a large field of view of 4.00° × 3.20°. In the zoom process, the wavelength range is 0.45-0.70 ㎛ and 0.75-1.10 ㎛, and the size of the optical system is 168 mm (L) × 90 mm (W) × 60 mm (H). The overall lens weight is only 170.8 g, which has advantages for miniaturization and light weight. At the Nyquist frequency of 104 lp/mm, the modulation transfer function of the visible-light optical system is more than 0.44, and that of the near-infrared optical system is more than 0.30, both of which have good imaging quality and tolerance characteristics in the range of -45 to 60 ℃.

Keywords

Acknowledgement

Jilin Province Key R&D Plan Project [China] (20210201029GX).

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