根据对相干激光雷达小型化、轻量化、低成本和高性能的要求,采用小口径、平面基底二元光学元件、对外差探测、收发合置的相干激光雷达天线系统进行简化。按照使用要求设计了一个透射式伽利略型天线系统, 设计参数为: 作为发射系统, 物方视场角2ω=10°, 出瞳口径Φ=100 mm, 束散角压缩比β=5×, 激光光源波长λ=10.6 μm。设计结果为系统的像质达到了衍射限。

According to the requirement to the coherent laser radar, a coherent laser radar antenna system was simplified by using a binary optics element with planar substrate to correct aberration. Only one large aperture spherical lens and one small aperture spherical lens as well as one small aperture binary optical corrector with planar substrate were used in the system. The designing parameters are, as a transmitting system, the objective field of view 2ω=10°, the aperture of the exit pupil Φ=100 mm, the reducing times of the angle of the diverging beam β=5×, the wavelength of the laser source λ=10.6 μm. The designing result is that the imaging quality of the optical antenna system reaches the diffraction limit.