论文部分内容阅读
提出了一种用于合成孔径激光成像雷达的双向环路结构的发射接收望远镜,双向环路包括发射4-f转像系统、接收4-f转像系统和独立的望远镜。发射通道中设置离焦和相位调制平板偏置,接收通道中设置离焦和相位平板偏置。控制发射离焦量,发射相位调制函数,接收离焦量,接收相位调制函数,用同一个望远镜可以同时实现空间二次项相位附加偏置的激光发射和消除目标点散射回波接收波面像差的离焦光学接收,并产生雷达运动方向上合适的和可控制的相位二次项历程,从而实现孔径合成成像。详细介绍了系统设计,给出了从发射到光电外差接收的全过程传输方程。
A telescope with two-way loop structure for synthetic aperture laser imaging radar is proposed. The two-way loop includes a transmitting 4-f rotating system, a receiving 4-f rotating system and an independent telescope. Defocus and phase modulation plate bias are set in the transmit channel, and defocus and phase plate bias are set in the receive channel. Control the amount of emitted defocus, launch the phase modulation function, receive the amount of defocus, receive the phase modulation function, with the same telescope can simultaneously achieve space quadratic phase additional bias laser emission and eliminate the target point scattered echo receive wavefront aberration Defocus optics to receive and produce an appropriate and controllable phase quadratic term in the direction of radar motion to achieve aperture synthesis imaging. The design of the system is introduced in detail, and the whole process of transmission equation from transmitting to receiving by photoelectric heterodyne is given.