Computer Hologram Color Rendition

Compared with traditional optical holography, computer generated hologram, not only has a flexible, fast, replicable and other characteristics, but also can produce the hologram reality non-existent virtual objects. As society increasingly rapid development of technology to make the calculation in three-dimensional holographic display, optical information processing, interferometry, data storage, optical computing and other fields are widely used. CGH color reproduction using a computer for preparing holograms, hologram reproduction has color information should be reproduced as a color image.In this paper, through the basic principle of optical holography and the coding method of the computer hologram to carry out the research,select modified off-axis reference beam coding method in the Burch coding method, through MATLAB software on grayscale objects to produce hologram by using Fourier Transforms, and realize the analog reproduction and optical reproduction.For the same object, by changing the size of the Fourier transform hologram, the influence of the size of the hologram reproduction image obtained hologram bigger, the smaller the reconstructed image; In the hologram size unchanged, as reproduced by varying the wavelength of the light source, so as to reproduce the relationship between research and the reproduction of the light source to give the size of the different wavelengths of the reconstructed image, the position is not the same, and the reconstructed image is not the same surface; For the same object, changing the carrier frequency by the size of the production process, research on the carrier frequency reconstructed images obtained with different carrier frequencies different image reproducing position.In order to obtain color reproduction FIG CGH, which is reproduced at different wavelengths, to be reproduced as coplanar, and other large and overlap position.By theoretical analysis, the production of each Fourier transform hologram (color object broken down into three primary colors, each color separately prepared hologram), the specific object scaling relationship and the relationship between the size of the carrier frequency, and designed to reproduce the optical path,To achieve a laser wavelength of 650nm of red and green light of 532nm as a light source to reproduce, obtain the reproduced image coplanar, and other large, coincident position, namely, the achievement of the object color reproduction.