Parallel frequency analysis of non-stationary, temporal and spatial signals by means of optical Wigner distribution function

利用光学维格纳分布函数对非平稳、时间和空间信号进行并行频率分析

基本信息

批准号：
04650031
负责人：
UOZUMI Jun
金额：
$ 1.34万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

项目摘要

By means of optical realizations of Wigner distribution functions, methods were developed for parallel, rapid analysis of local spectra of temporal and spatial signals. The developed methods were applied to the analysis of specklegrams in the speckle photography. Because of the faster progress of the project than the initial plan, a new technique was also investigated for designing optical systems of information processing by using the concept of the Wigner distribution function. Main results are summarized in the following.1.By exploiting a liquid crystal spatiallight modulator as an input device, an optical information processing system was developed for generating the Wigner distribution function of image objects fed by a computer or a video camera.2.The developed optical system was applied to the analysis of specklegrams in speckle photography, and was shown to give an image of loacl displacement distribution of objects.3.By introducing a single acousto-optic modulator in the input plane of the developed information processing system, a new system was developed for generating the Wigner distribution functions of temporal signals.4.On the basis of the principle that the Wigner distribution function describes behaviors of signals in space and spatial frequency simultaneously, a new method for designing phase filters for Banyan, perfect shuffle, and cyclic shift optical interconnections. Those filters were actually realized by means of CGH.5.As a further development of the proposed optical interconnections, a new type of compact interconnections for optical neural networks and a new type of optical matrix-matrix multiplier were developed and their performance was verified experimentally.

通过对Wigner分布函数的光学实现，开发了用于平行，快速分析时间和空间信号局部光谱的方法。将开发的方法应用于斑点摄影中斑点的分析。由于项目的进展要比初始计划更快，因此还研究了一种新技术，用于通过使用Wigner分布函数的概念来设计信息处理的光学系统。主要结果总结在以下内容中。1。通过利用液晶空间光调制器作为输入设备，开发了一个光学信息处理系统，以生成由计算机或摄像机馈送图像对象的Wigner分布功能。在开发的信息处理系统的输入平面中，开发了一个新系统，以生成时间信号的wigner分布函数。实际上，这些过滤器是通过CGH实现的。5。随着所提出的光学互连的进一步开发，一种用于光学神经网络的新型紧凑型互连，并开发了一种新型的光学矩阵矩阵乘数，并进行了实验验证其性能。