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介绍了四棱锥传感技术的基本原理和数学模型。当以调制模式工作时,可计算复原矩阵或梯度矩阵。分析了调制半径在不同像差条件下对复原速度和精度的影响,对无调制模式采用复原矩阵进行了仿真,并与调制模式进行了对比。实验结果表明:无调制状态下,经过校正,残差RMS可减至0.05,调制状态下,梯度矩阵重构效果较好,残差RMS可减至0.02;对大像差的输入信号,调制模式的精度和速度都优于无调制模式。结果表明,四棱锥波前传感技术具有高速度、高精度和灵活的工作模式,是一种先进的波前传感技术。
The basic principle and mathematical model of pyramid sensing technology are introduced. When working in modulation mode, the recovery matrix or gradient matrix can be calculated. The effects of modulation radius on the recovery speed and accuracy under different aberrations were analyzed. The modulation matrix was simulated by using the recovery matrix and compared with the modulation scheme. The experimental results show that under the condition of no modulation, the residual RMS can be reduced to 0.05 after the correction, and the reconstruction effect of the gradient matrix is better under the modulation condition and the residual RMS can be reduced to 0.02. For the large aberration input signal, the modulation mode The accuracy and speed are better than no modulation mode. The results show that the quadrangular pyramid wavefront sensing technology has high speed, high precision and flexible working mode, which is an advanced wavefront sensing technology.