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报道一种可以进行空间相位偏置的光学望远镜,用作合成孔径激光成像雷达中的光学发射天线。在望远镜内放置相位调制平板,控制望远镜的离焦量和位相调制平板的相位函数,能够在激光望远镜的照明区产生可控制的附加空间相位二次项,灵活改变激光照明波前,以在目标回波接收信号中产生雷达运动方向上的所需的二次项相位历程,因此能够实现特定的方位向成像分辨率。
An optical telescope capable of spatial phase biasing is reported as an optical transmitting antenna in a synthetic aperture laser imaging radar. Placing a phase modulation plate in the telescope to control the amount of defocus of the telescope and the phase function of the phase modulation plate produces a controllable additional quadrature quadratic term in the illumination area of the laser telescope to flexibly change the laser illumination wavefront for The desired quadratic phase phase history in the direction of radar motion is generated in the echo receive signal so that a specific azimuthal imaging resolution can be achieved.