Knop K
Appl Opt. 1978 Nov 15;17(22):3598-603. doi: 10.1364/AO.17.003598.
Phase gratings with deep rectangular grooves have been successfully used in the zero diffraction order as transmission color filters. They form the basis of the ZOD microimage system for recording color images as surface-relief structures. ZOD images can be inexpensively replicated by hot embossing in a transparent sheet of plastic and read-out using conventional slide projectors or microfilm viewers. In this paper we use rigorous diffraction theory to derive optimum grating parameters for gratings with periods d < 2 microm to produce the three subtractive primary colors, cyan, magenta, and yellow, and also green. The theoretical results are in good agreement with the experiment.
具有深矩形凹槽的相位光栅已成功用作零衍射级的透射滤色器。它们构成了用于将彩色图像记录为表面浮雕结构的ZOD微图像系统的基础。ZOD图像可以通过在透明塑料片上热压印廉价地复制，并使用传统的幻灯片放映机或缩微胶片观察器读出。在本文中，我们使用严格的衍射理论来推导周期d < 2微米的光栅的最佳光栅参数，以产生三种减色法原色，即青色、品红色和黄色，以及绿色。理论结果与实验结果吻合良好。
