基于相位差异技术的车载白天高分辨成像系统（英文）

Vehicular Daytime High-resolution Imaging System Based on Phase-diversity Technology

在1.2m车载望远镜的基础上,通过机上折轴卡塞格林焦点,将主光学系统与白天成像系统相连,实现了白天高分辨成像.该系统采用短波红外波段,在精密跟踪的同时,校正大气波前整体倾斜.近红外波段的双通道成像系统,通过在焦与离焦像面同时采集后,利用相位差异技术来提高成像分辨率.该系统探测能力达到5等星,成像分辨率接近两倍衍射极限,观测时间比自适应系统延长6h.

A bent Cassergrain focus was used to connect a daytime imaging system to a 1.2 m aperture vehicular telescope. The system employs a short-wavelength infrared waveband for precise tracking and corrects the global atmospheric wavefront tilt at the same time. Double-pass imaging is applied to the near-infrared waveband to produce the image, while the phase-diversity technique is used to restore the image resolution. The system can detect and correct objects with a magnitude 5 or less at an image resolution that is close to twice the diffraction limit. The observation time is 6 hours longer than that of the adaptive system.