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

• 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
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650031/
• 关键词: Wigner distribution function; Frequency analysis; Speckle photography; Liquid crystal SLM; Acousto-optical modulator; Optical interconnect; Optical neural network; Optical matrix multiplier; 光情報処理; スペックルグラム; 変位測定

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，发展了对时间和空间信号的局部谱进行并行、快速分析的方法。将所提出的方法应用于散斑照相中散斑图的分析。由于该项目的进展速度比最初的计划快，还研究了一种新的技术，用于设计信息处理的光学系统，使用维格纳分布函数的概念。主要研究结果如下：1.利用液晶空间光调制器作为输入器件，研制了一套光学信息处理系统，可由计算机或摄像机输出图像物体的维格纳分布函数。2.将研制的光学系统应用于散斑照相术中散斑图的分析，3.通过在所开发的信息处理系统的输入平面中引入单个声光调制器，4.基于Wigner分布函数同时描述信号在空间和空间频率上的行为的原理，一种设计Banyan、完全混洗和循环移位光学互连的相位滤波器的新方法。这些滤波器实际上是通过CGH来实现的。5.作为对所提出的光互连的进一步发展，我们开发了一种新型的用于光神经网络的紧凑互连和一种新型的光矩阵-矩阵乘法器，并对它们的性能进行了实验验证。

项目成果

J.Widjaja, J.Uozumi and T.Asakura: "Wigner distribution's support to optical neural networks" Proceedings of IEEE International Conference on Neural Network Applications to Signal Processing. 32-37 (1993)

J.Widjaja、J.Uozumi 和 T.Asakura：“Wigner 分布对光学神经网络的支持”IEEE 国际神经网络应用信号处理会议论文集。

J.Widjaja: "Optical implementation of antificial synapses by means of Wigner distribution approach" Optical Engineering. 33(発表予定). (1994)

J.Widjaja：“通过维格纳分布方法实现反义突触”光学工程 33（待提交）。

J.Widjaja: "Wigner distributions support to optical neural networks" Proc.IEEE Conf.Neural Network Applications to Signal Processing. 32-37 (1993)

J.Widjaja：“维格纳分布对光学神经网络的支持”Proc.IEEE Con​​f.神经网络在信号处理中的应用。

J.Widjaja, J.Uozumi, T.Ushizaka and T.Asakura: "Realtime generation of the Wigner disribution function by means of single acousto-optic modulator" Optics Communications. 94(5). 313-320 (1992)

J.Widjaja、J.Uozumi、T.Ushizaka 和 T.Asakura：“通过单个声光调制器实时生成维格纳分布函数”光学通信。

J.Widjaja: "Optical implementation of the Banyan network using the Wigner distribution approach" Optics Communications. 100. 426-430 (1993)

J.Widjaja：“使用 Wigner 分布方法实现 Banyan 网络的光学实现”Optics Communications。