利用扭曲向列型液晶光阀实现对数字全息再现像质的改善

摘要

A novel method for improving holographic image definition is presented. The edge holographic image was obtained from the primitive image by differential operation and computer-generated holography transform. The image of holographic reconstruction was adjusted by adjusting the contrast of edge holographic image and concocting of liquid crystal light valve. The image of holographic reconstruction was clearer than the primitive image. The adjusting function of gray of black and white was deduced. The approximate formula was deduced between light-intensity with gray using MATLAB. The image was improved by this formula, making the holographic reconstruction image clearer.%提出一种提高全息图像的清晰度的新方法.即原始图像经过微分运算和计算全息的变换后,得到它的边缘全息图,然后对该边缘全息图的对比度进行调节,再通过液晶光阀的调制作用,得到这幅调整后的全息图的再现像.这样得到的全息图的再现像比原来边缘全息图更为清晰.文中推导了黑色和白色的灰度调节函数,同时借助实验数据利用Matlab推导了光强与灰度的近似公式,并利用这些公式对图形进行了改善,实现了更为清晰的全息再现演示.