反射式紫外天基单镜计算成像系统设计

紫外天基成像是目前对太阳观测的主要手段之一。针对紫外天基遥感对成像系统高分辨、轻量化的需求，开展了紫外天基单镜计算成像系统研究，应用“光学镜面设计”与“计算成像”相结合的思路，通过对球面、六次偶次非球面、十次偶次非球面、Q-type面、Zernike多项式面的天基反射镜成像光学系统设计，以及基于傅里叶叠层超分辨的计算成像分析，验证了该设计方法可在波长135 nm紫外光波段实现5.4°圆视场、分辨能力优于0.11 mm的设计指标。反射式六次偶次非球面具备一定的综合优势。

Computational imaging system of single mirror for space solar ultraviolet observation

The space-based ultraviolet imaging is one of the principal approaches for the solar observation. In order to meet the requirements of the high resolution and lightweight imaging for the ultraviolet space-based remote sensing system, the single mirror computational imaging system for the space-based ultraviolet remote sensing is studied in this paper. By combining the idea of the “optical mirror design” and the “computational imaging”, the optical system design using the spherical surface, the sixth-order even order aspheric surface, the tenth-order even order aspheric surface, the Q-type surface, and the Zernike polynomial surface are carried out, respectively, together with the computational imaging based on the Fourier lamination super-resolution. It is shown that the designed systems with the algorithmic image reconstruction can achieve a circular field view up to 5.4° and a resolution better than 0.11 mm at the ultraviolet wavelength of 135 nm. The reflective sixth-order even order aspheric surface system enjoys certain comprehensive advantages.