论文标题
血浆密度测量的真正光学衍生物
True optical spacial derivatives for plasma density measurements
论文作者
论文摘要
本文在分析上和数值上表明，与中性密度滤清器耦合到中性密度过滤器时，当放置在$ 2F $镜头对的焦平面时，可以提供真正的光学导数。该技术将强度的空间变化转化为强度，哪个平方根是初始强度变化的空间导数。更令人惊讶的是，它还将任何相位的空间变化变成强度，哪个平方根是初始相变的空间衍生物。由于光学导数会降低信号的直流成分，因此可以在不使用任何干涉仪的情况下光学地测量完整的电子等离子体湍流光谱。
This paper shows analytically and numerically that a vortex plate coupled to a neutral density filter can deliver a true optical derivative when placed at the focal plane of a $2f$ lens pair. This technique turns spatial variations in intensity into an intensity, which square root is the spatial derivative of the initial intensity variation. More surprisingly, it also turns any spatial variations in phase into an intensity, which square root is the spatial derivative of the initial phase variation. Since the optical derivative drops the DC component of the signal, it is possible to measure the full electron plasma turbulence spectrum optically, without using any interferometer.
