用衍射分色法制作彩色全息图

彩色全息图的制作是当今全息显示技术中的一个重要研究内容，对全息显示的发展有重要的意义，彩色全息图的制作方法较多，为了提高彩色全息图的质量，提出了用衍射分色法制作彩色全息图，它是通过使用三色光栅，把一张彩色透明片的红、绿、兰信息编码记录在一张黑白胶片上，用单色激光同时再现出所记录的3种颜色的光强分布并将它们记录在一张全息片上作成彩色全息图，该方法的显著优点是制作过程中无须制作3张分色掩膜信息的全息图，改进了3分色法的对准问题，使制作的全息图衍射效率高，再现像的色彩清晰，明亮，还原性好。

Colour Hologram Making with Diffraction Colour Separation Method

Colour hologram making is an important part of research hologram display technology. Nowadays it has great influece upon improving the hologram display. Although different ways of producing colour hologram exist ,to get the better quality of colour hologram,a new way is found to produce it by diffraction colour separation method. The red,green and blue information code of a colour transparent film can be recorded on a black-and-white film with a three-colour grating. Monochromatic laser is used to reproduce at the same time the distributions of the recorded three-color colour information, and to record them on a holographic film to make a colour holographic image. The remarkable advantage is that there is no need to make three holographic images with information covered with colour selection, that the diffraction efficiency is high,and that the reproduced image is of clear and bright colour.