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两面锥波前传感器(two-sided pyramid wavefront Sensor,TSPWFS)是一种高空间采样率和高光能利用率的波前传感器.为了深入研究它的波前复原原理,采用波动光学理论详细推导了无调制TSPWFS的衍射理论,给出了无调制TSPWFS波前复原时线性重构矩阵的解析解,并且通过数值仿真确定出最佳的光瞳像中心间距,并对静态像差的波前复原及闭环校正进行数值仿真.分析结果表明,无调制TSPWFS具有波前复原时不需要现场测量响应矩阵,可以校正系统像差,闭环校正结果稳定等优点,可以在实际自适应光学系统中进行波前探测.
A two-sided pyramid wavefront sensor (TSPWFS) is a wavefront sensor with high spatial sampling rate and high light energy utilization. In order to further study its wavefront restoration principle, The diffraction theory of TSPWFS is modulated, and the analytical solution of the linear reconstruction matrix in the unmodulated TSPWFS wavefront restoration is given, and the optimal pupil image center spacing is determined by numerical simulation. The wave front recovery and closed loop of the static aberration The simulation results show that the modulation-free TSPWFS has the advantages of no need of on-site measurement of response matrix, correction of system aberrations and stabilization of closed-loop correction, which makes it possible to conduct wavefront detection in practical adaptive optics systems.