In this Letter, we report a segmented large-scaled lightweight diffractive telescope testbed newly built in our laboratory. The telescope, consisting of one 710-mm-diameter element in the center surrounded by eight 352-mm-diameter elements and a smaller eyepiece of achromatic lenses, can realize wide-band high-resolution imaging of 0.55–0.65 µm. The stitching errors are coarsely corrected by adjusting the motion stage mounted on each element. In particular, an optical synthesis system inserted behind the eyepiece is designed to compensate the residual tip-tilt-piston errors. We present the experimental imaging result of two stitched elements, which is the first successful experimental verification obtained by a practical segmented diffractive telescope to enhance the resolution. Moreover, spatial modulation diversity technology is used to restore the synthetic image so as to improve its quality and contrast.

中文翻译：

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分段大型轻量衍射望远镜的宽带高分辨率合成成像

在这封信中，我们报告了在我们实验室中新建的分段式大型轻型衍射望远镜试验台。该望远镜由一个中心的710mm直径的元件和八个352mm直径的元件以及一个较小的消色差透镜目镜组成，可以实现0.55-0.65 µm的宽带高分辨率成像。通过调整安装在每个元件上的运动平台，可以粗略地校正拼接误差。尤其是，在目镜后面插入的光学合成系统设计用于补偿残留的尖端倾斜活塞误差。我们介绍了两个缝合元件的实验成像结果，这是通过实用的分段衍射望远镜提高分辨率获得的第一个成功的实验验证。此外，