A Synthetic Aperture Imaging Ladar Demonstrator with ф300mmAntenna and Changeable Footprint

摘要

A demonstrator of synthetic aperture imaging ladar (SAIL) is constructed with the maximum aperture 0300mm of antenna telescope. This demonstrator can be set with a rectangular aperture to produce a rectangular footprint suitable for scanning format with a high resolution and a wide strip. Particularly, the demonstrator is designed not only for the far-field application but also for the verifying and testing in the near-field in the laboratory space. And a 90 degree optical hybrid is used to mitigate the external phase errors caused by turbulence and vibration along line of sight direction and the internal phase errors caused by local fiber delay line. This paper gives the details of the systematic design, and the progresses of the experiment at a target distance around 130m.