球差对多色部分空间相干光衍射引起的光谱开关的影响

Influence of spherical aberration on diffraction-induced spectral switches of polychromatic partially coherent light

基于空间频率域交叉谱密度函数的传输公式,推导了有球差多色部分空间相干光被光阑衍射后轴上点光谱的解析表达式,而完全空间相干光的结果可作为本公式的特例。着重分析了球差对一阶光谱开关的影响,结果表明,球差会引起光谱移动的不同和光谱开关临界位置的变化。

An analytical expression for the on-axis spectrum of spherically aberrated polychromatic partially coherent light diffracted at an aperture was derived based on the propagation law of the cross-spectral density function. Spatially fully coherent result was obtained as a special cause. The influence of spherical aberration on the behaviors of spectral switches was stressed. It was shown that spherical aberration may induce differences of spectral shift and changes of the critical position