Research on Architecture of Optical Computer

本文研究了一种具有大容量信息处理能力的光计算机的体系结构，并阐明了它的研制方案。在我们的研究中，取得了以下成果：1.搭建了一套光电混合光学并行阵列逻辑系统的实验系统。该系统采用液晶显示器和电荷耦合器件电视摄像机作为光电系统的接口器件。反馈环由个人计算机系统实现。界面显示的对比度是影响系统处理速度的重要因素。使用检流镜，可以增加系统的灵活性和处理能力。对OPAL并行编程技术进行了研究。在本研究中，发展了一种利用光学阵列逻辑进行空间可变运算的方法。光学阵列逻辑是Opals的处理基础。在光学阵列逻辑的编程中，针对不同的数据处理范围研究了方向图逻辑的概念，并对其性能进行了验证。开发了一种用于政治数组逻辑的程序设计语言，并研究了一些有用的概念，如运算核和簇的乘法、求反等。利用这些技术和概念，开发了各种并行处理程序，并在OPALS实验系统上进行了验证。研究了一种基于神经网络的新型光学处理系统的体系结构。研究了一种具有正交变换的联想记忆系统。还考虑了一个利用神经网络的恢复能力的高可靠性系统。在这项研究中，阐明了多层系统的有用性，甚至对光学系统也是如此。神经网络在Opals上的实现仍是未来的工作。

An architecture of an optical computer capable of large capacity information processing has been investigated and a scheme of its decelopment has been clarified. In our research the following results have been obtained.1. An experimental system of the opto-digital hybrid OPALS (optical parallel array logic system) has been constructed. In the system a liquid crystal display and a charge coupled device TV camera are used as interface devices between optical and electronic systems. Feed back loop is implemented with a personal computer system. Contrast of the display for interface is an important factor in processsing speed of the system. With a galvanometer mirror, flexibility and capability of processing of the system can be increased.2. Techniques of parallel programming for OPALS have been investigated. In this study, a method for space-variant operation has been developed using optical array logic. Optical array logic is the processing basis of the OPALS. In programming of optical array logic, a concept of pattern logic has been studied for various range of data processing and its capability has been verified. A programming language for potical array logic has been developed and some useful concepts such as multiplication and negation of operation kernel and cluster have been satudied. Using these techniques and concepts various programs of parallel processing are developed and verified by the experimental system of the OPALS.3. An architecture based on neural network has been investigated as a a new type of optical processing system. an associative memory system with orthogonal transform has been studied. A high reliable system utilizing restoration capability of neural network also has been considered. In this study usefulness of a multi-layer system is clarifid even for optical systems. Implementation of neural network on the OPALS remains as a future work.