计算机与光学联合制三维物体彩色全息图的新方法

A new method of making three-dimensional color holograms by combining computer with optic holography

针对光学漫射物体彩色全息图制作过程中光能利用率低和彩色图像质量不高的问题,利用计算全息的灵活性,并结合光学全息的特点,提出了计算机与光学相结合的三维物体真彩色全息图制作的新方法.首先用计算机算出3张分色菲涅耳全息图,由全息图的再现像位置以及物点和线全息图的对应关系,控制好这3张菲涅耳全息图的记录距离和全息图大小,使它们放置同一个平面时,其再现像能完全重合.再用光学的方法记录它们的再现重合像,在白光下可见一真彩色立体像.该方法简单易行,光能利用率高.

Based on the problem of inefficient light energy, and the quality of color holograms in making color holograms for diffuse objects, taking advantages of the computer-generated hologram and the characters of optical holograms. It was proposed a new method of making three-dimensional color holograms by combining computer with optical holography. Three monochromatic Fresnel holograms were computed by computer, according to the place of image and the corresponding relation of object and slit hologram, the recorded distance and the size of three monochromatic Fresnel holograms were controlled. As a result, when placed in the same plane, images would have a good superposition. Reconstruction images by optical method could then recorded, and three-dimensional color image could be seen by the white light. This method was showed to be easy and have an efficient light energy