Shimizu A, Sakuda K
Appl Opt. 1997 Aug 10;36(23):5769-74. doi: 10.1364/ao.36.005769.
To measure diffraction efficiencies of gratings as a function of wavelength, it is necessary to have quasi-monochromatic light sources of various wavelengths. We propose a method to measure the wavelength dependence of the grating diffraction efficiency by using a quasi-monochromatic light source. This method of estimating the real diffraction characteristics of the gratings for various wavelengths is very useful and simple. First the diffraction efficiency of the grating as a function of various incident-beam angles of monochromatic light is measured, then, using these data, we can obtain the diffraction efficiencies for various wavelengths of the same incident angle of light by virtue of a mathematical-conversion method. The mathematical-conversion results for two laminated differently slanted angle gratings of the same volume grating period are in good agreement with the experimental ones.
为了测量光栅衍射效率随波长的变化，需要有各种波长的准单色光源。我们提出了一种利用准单色光源测量光栅衍射效率波长依赖性的方法。这种估计光栅在各种波长下实际衍射特性的方法非常有用且简单。首先测量光栅衍射效率随单色光不同入射角的变化，然后利用这些数据，借助数学转换方法，我们可以得到相同入射角下不同波长的衍射效率。两个具有相同体光栅周期但倾斜角度不同的层叠光栅的数学转换结果与实验结果吻合良好。
