Color Hologram Display With Large Viewing Angle Generated By Combining Computer With Optical Method

Holographic display is one of the most important research topic in hologram. Color holography has a great vitality in holographic display.For color holograms can display the true color of objects,so they attract more attentions than others.Besides, by the deepening of quiet color holograms study,color dynamic holograms with large viewing angle is brought up to date,in order to perfect hologram display and meet various business activities.In this paper,we probe into the obtaining of objects,basal theory of holography, computer-generated holography(CGH),mirror images arithmetic and color hologram synthesize.By combining computer-generated holography with optical method,we proposed a new method for generating color dynamic holograms with a large viewing angle.Theory analyses and experiments are given to approve the feasibility of this method,and some satisfactory results have been reached.Four parts are divided in this paper:The first part:Making a detailed retrospect of optical hologramphy and the course of computer-generated holography,analysing and evaluating various holography displays,then introduce some basal theory to make them as the theory of this paper.The second part:Researching three-dimensional true-color holograms by combining computer with optical holography.The third part:Researching three-dimensional true-color holograms with large viewing angle by combining computer with optical holography. The fourth part:Researching three-dimensional true-color dynamic holograms with large viewing angle by combining computer with optical holography.The detail research jobs include:1.How to obtain the data information of three-dimensional color objects,and simulate the expression of light-wave.We should choose an optimal expression to meet the calculation of computer-generated hologram.2.The synthesize of color hologram.Based on the relationship of object and image and the theory of color hologram,we propose a new method to make a true-color hologram with high quality.3.The object light-wave based on mirror image method is calculated.We fold object light distribution of large dimension holograms into small holograms, so the holograms can be print with small dimension.4.Shooting the dynamic true-color holograms,and synthesizing some dichroic holograms into colorful hologram,removing crosstalk,decreasing the distortion of color,improving the reconstructed image and making a three-dimensional real-color hologram with a wide viewing angle.Innovation of this paper:1.Taking full advantages of computer-generated hologram,equivalent slot is proposed.Monochromatic holograms H₁ are computed in different area of the same plane.This technology not only eliminate noise,but also enhance the effect of luminous energy.2.Based on the method of mirror image,we proposed an algorithm of light wave.However the viewing area restricted by the size of the master hologram H₁.We can fold large dimension hologram into smaller one by the method of mirror image,then unwrap it through optical ways.This technique avoids the difficulty of generating large dimension hologram by computer-generated holography,and realizes hologram display with a large viewing angle.