光折变晶体Cu:KNSBN的多重图像存贮实验研究

Experiments on Multi-image Storage in Photorefractive Crystal Cu-doped KNSBN

目前,光折变非线性元件在光学并行图像处理中有着非常广泛的应用。光折变晶体用于图像边缘增强,图像加、减运算,非相干—相干转换(PICOC),图像相关和卷积运算等研究已取得显著成果。本文研究了Cu;KNSBN晶体中多重图像的存贮问题,指出可以利用这种技术实现光学目标识别并给出了一些初步实验结果。此外,还从理论上分析了具有相同衍射效率的多重全息信息记录技术。

Recently,photorefractive nonlinear devices are widely used in the field of highly parallel image processing. Photorefractive devices are notably demonstrated in image edge enhancement,image addition/subtraction,photorefractive incoherent-to-coherent optical converter (PICOC), image correlation/convolution and soon this paper, describes our study on multi -image information storage in Cu-doped KNSBN crystal bulk,points out that this technique can be possibly used in optical pattern recognition and shom some results. Moreover,the paper also represents a theoretical analysis on the technology of multi - image holographic recording with equal diffraction efficiency.