机动式车载自适应光学波前处理器的设计

为满足机动式车载自适应光学系统的需求,设计了专用的波前处理器。该波前处理器采用波前处理主板、波前处理子板和DA转化板相结合的硬件架构,由光纤作为通信载体。在满足功能需求的同时提高了系统的可靠性;波前处理器是自适应光学系统闭环控制的运算中心,其运算延时直接影响系统的控制带宽。本文提出一种基于FPGA的多线流水自适应光学实时波前处理方法,实现了波前斜率计算、复原运算和控制运算。结果表明:对于两级精密跟踪,97个子孔径以及97单元变形镜的自适应光学系统,系统处理延时为506.25μs,满足系统1 500Hz的实时波前处理需求。

Design of mobile vehicle-based adaptive optical wave-front processor

In order to meet the demands of a mobile vehicle-based adaptive optical system, the traditional wave-front processor hardware architecture was redesigned. In this study, we combined a wave-front processing board, wave-front processing daughter board and DA conversion board, using optical fiber for board communication. In this way, the reliability of the system was improved while the functional requirements were satisfied. Meanwhile, the wave-front processor is the computing center of the closed-loop control of the adaptive optical system, and its operation delay directly affects the control bandwidth of the system. This paper presents a multi-pipeline adaptive real-time wave-front processing method based on FPGA to complete the slope calculation, restoration calculation, and control calculation. For the adaptive optical system, which can provide two-stage precision tracking and consists of 97 sub-apertures and 97 deformation mirrors, the processing delay is 506.25 μs, meeting the requirement of 1 500 Hz real-time wave-front processing.