Based On Image Block In The Synthesis Of Holographic Records And The Related Research

Hologram display technology has the characteristic of the true three dimensional feature, which gradually becomes a hot topic of the current research and applications. This paper studies the holographic records and reconstruction of large format digital image, and then studies that different sub-block records will generate different zero-order light. The effective analysis and experiments are done.First, this paper outlines the basic theory of holographic technology and the development process, sums up the main technical problems faced in large format synthesis hologram. The specific program of X-type and Y-type segmentation in large format hologram are analyzed.Second, because large format two-dimensional image can not display on full screen of Spatial Light Modulator at once, the X-Y type segmentation method is used effectively, which solves the problem in large format synthetic hologram in principle. An experimental system is designed to confirm the feasibility of this method.At last, this paper studies that synthesis hologram with segmentation has great impact on zero-order diffracted image in holography. It illustrates zero-order diffracted image is caused by object light autocorrelation. Block synthesis hologram can reduce the autocorrelation area. Different sub-block coding hologram records will generate special autocorrelation distribution pattern, however, the±1order images remain unchanged. This special distribution can be used in hologram encoding and some other special occasions. Then, the paper compares hologram autocorrelation peak with that of JTC. Matlab simulation is used to get hologram with variety of encoding methods. For example, the1X2,2X2, triangles sub-block and other block programs were used for holographic recording. Accordingly, the holograms show three-point distribution pattern, Tian word squares pattern, star pattern and so on. Finally, an experimental system is designed to verify the conclusions.