多平面全息三维显示及其噪声消除研究

基于层析法和Gerchberg-Saxton迭代算法，计算得到了多个平面构成的三维物体的计算全息图,并将该计算全息图加载于空间光调制器上，获得了具备全视差的三维立体显示。基于以上方法，对灰度图像进行显示，获得了较高的像质。构建了由100个平面组成的立方体，获得了立方体的三维图像。另外，在计算全息图时附加了相位平移函数，消除了由空间光调制器的栅格结构引起的多重衍射像噪声，将能量利用效率提高到原来的379%。这样，可获得高衍射效率、高像质且具备全视差的三维全息显示。

Multi-plane holographic display and its noise elimination

The computer-generated hologram of multi-plane three dimensional object was produced based on chromatography and the Gerchberg-Saxton algorithm. And a three dimensional display with full parallax was obtained by writing the hologram into spatial light modulator. According to this method,the gray image was displayed and high image quality could be got.The cube composed of 100 planes was set up and its 3D image could be obtained.In addition, the phase translation function was added into the computer-generated hologram ,the noise of multi-order diffraction images, which arose from the grid-structure of spatial light modulator, was eliminated substantially,then the energy utilization efficiency was as much as 379% of before. Thus a 3D holographic display of high diffraction efficiency, high image-quality and full parallax can be realized.