模压全息图片的噪声

本文把全息看作信息传递过程，从把信息（图象）加载到作为载波的物光上开始，通过参考光相干接收，并存储在干板上，经电铸，模压转移信息，最后用再现光把信息解调出来，这当中的任何一过程都会受到遇外干扰，它们就形成噪声。本文指出每一过程可能产生的噪声和抑制办法，并重点分析了散斑噪声，干版，模板和ＰＥＴ材料自身的粒散噪声，指出提高全息质量的关键，乃是在保持恰当衍射效率的情况下，提高信噪比的问题。

The noise of embossing hologram

In this paper,the holograms are thought as the transmission process of information.The information(image)is added to object light as carrier wave and memoried in plate by coherent receiving of reference light.Byelectroforming and embossing.The information is decoded by reconstructing light.Every process of them is possiblenoise coming from every process and gives detail discussion the speckle noise.This paper point out the possible noise coming from every process and gives detail discussion the speckle noiseand granularity noise coming from plate,model plate and PET materials. Presents the key to improve quality is toimprove signal to noise ratio with suitable diffraction efficiency.