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一、前言利用非对称双级炫耀光栅对莫尔条纹倍增作用的研究是波斯特进行的,研究结果发表在“应用光学”(APPLIED OPTICS)1971年第10卷第4期上,其基本内容如图1,将200～1200线/mm相位型细光栅与20线/mm黑白粗光栅重迭起来,用单色平行光束照射时,光束的入射角这样安排:使细光栅的法线平分两主衍射级之间的夹角,两主衍射级的光线在两光栅的空隙间对称传播、经过粗光栅进行第二次
I. INTRODUCTION The study of the double effect of moiré fringes using an asymmetric two-stage flare grating was done by Post, and the results of which were published in APPLIED OPTICS, Vol. 10, No. 4, 1971, whose basic content is as follows Figure 1, the 200 ~ 1200 line / mm phase thin grating and 20 line / mm black and white coarse grating overlap, monochromatic parallel beam irradiation, the incident angle of the light beam is so arranged: the fine grating normal bisectors Diffraction between the diffraction angle, the two main diffraction order of the light in the two grating between the symmetrical propagation through the coarse grating for the second time