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激光衍射法测不透明单丝直径是一种非接触式高精度的测量方法。它在工业上得到了广泛的应用。现就测量中经常碰到的几个问题作一讨论。单丝衍射和单缝衍射的关系宽度相同的单缝和单丝重合在一起,构成一个不透明衍射屏。在衍射屏后面的空间,光场的复振幅恒等于零。这就是巴俾涅互补原理。可见单丝和单缝的衍射场复振幅之间只相差一个位相。由于衍射光强度与衍射场上光的复振
Laser diffraction method to measure the opaque monofilament diameter is a non-contact high-precision measurement method. It has been widely used in industry. Now on the measurement of several frequently encountered problems to make a discussion. Monofilament diffraction and single-slit diffraction relationship between the width of the same single slit and monofilament overlap together to form an opaque diffraction screen. In the space behind the diffractive screen, the complex amplitude of the light field is always equal to zero. This is the Babylonian principle of complementarity. Visible monofilament and single-slit diffracting complex amplitude difference between only one phase. Due to the diffracted light intensity and the complex field of diffraction light