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合成孔径激光成像雷达(SAIL)的主要技术指标如光学足趾尺寸和成像分辨率等都必须在所设计的远距离传输后实现。提出了一种在实验室空间近距离实现SAIL全系统贯通验证的方法,即在SAIL中附加光学装置使得其在近距离产生发射光束的准几何投影和足够大的外差接收视场,从而产生近距离二维SAIL成像必需的并且适当的光学足趾和方位向二次项相位历程。给出了一种Φ300 mm口径合成孔径激光成像雷达演示样机的主体结构和光学附件装置的设计方案,实现了实验室空间近距离演示验证,给出了在14 m传输距离上的二维SAIL成像动态演示的结果,实验测得光学足趾达到22 mm×22 mm,成像分辨率优于1.4 mm(方位向)×1.2 mm(距离向)。
The main technical specifications of Synthetic Aperture Laser Imaging Radar (SAIL), such as optical toe size and imaging resolution, must be achieved after the designed long-range transmission. A method to achieve SAIL system-wide verification in the shortest space of the laboratory is proposed. In the SAIL, an additional optical device is used to generate a quasi-geometric projection of the emitted beam and a sufficiently large heterodyne receiving field to generate Close-range two-dimensional SAIL imaging necessary and appropriate optical toe and azimuth quadratic phase history. The main structure of the prototype of the Φ300 mm aperture synthetic aperture laser imaging radar and the design scheme of the optical accessory device are given. The short range demonstration of the laboratory space is verified. The 2D SAIL imaging at the 14 m transmission distance is given The results of the dynamic demonstration show that the optical index of the toes is 22 mm × 22 mm and the resolution is better than 1.4 mm (azimuth) × 1.2 mm (distance).