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Developmental Research on Optical Analogue Computing System for Discriminating Plural Shapes of objects and/or letters simultaneously and instantaneously

同时瞬时判别多个物体和/或字母形状的光学模拟计算系统的发展研究

基本信息

批准号：
10555138
负责人：
SHIMIZU Isao
金额：
$ 7.68万
依托单位：
Ibaraki National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

To make hologram easily, the vessel (VPPH) for automatically developing Photo-conductor Plastic Hologram (PPH) with solvent vapor has been made for experiment and has been improved. A new type of VPPH for practical use has been developed to make a Multiplexed Matched Spatial Filter (MMSF) rapidly and simply. VPPH constitutes the central part of the optical analogue computing system for discriminating plural shapes simultaneously and instantaneously. The optical analogue computing system is composed of a laser, optical system for making hologram and PPHV which are aligned on a rail base, in order to avoid the influence of vibration from outside. In view of these facts, new techniques have been established as followings. The system for being able to make hologram in a few minutes on a wooden table in a twilight room has been developed, the system is tested and evaluated for ability for making MMSF, it is ascertained that the system has high ability for making MMSF having high efficiency. The system for discriminating plural shapes simultaneously and optical-analogously, that is, an optical analogue computer, is composed of a laser, optical setup for making MMSF, a Spatial Light Modulator (SLM), CCD camera for taking images of the discriminated shapes, a display for projecting the images and a personal computer for projecting the alignment of reference shapes as an algorithm. In consequence of experiments for discriminating shapes of particles and/or letters, it is confirmed that those shapes can be discriminated simultaneously in light speed by the new system. In order to inspect the externals of board loading electronic parts, the new technique is applied. Some kinds of defects existing on a board can be discriminated simultaneously and instantaneously by this technique. And, it is clarified in the experiments that the developed technique is applicable to discriminate images of flow vectors taken to photograph in dense field of particles.

为了方便制作全息图，研制了一种利用溶剂蒸汽自动显影光导体塑料全息图的容器（VPPH）进行实验，并对其进行了改进。为了快速、简便地制作多路匹配空间滤波器（MMSF），开发了一种实用的新型VPPH。VPPH是光学模拟计算系统的核心部分，用于同时和瞬间识别多个形状。光学模拟计算系统由激光器、全息成像光学系统和PPHV组成，它们排列在导轨基座上，以避免外界振动的影响。鉴于这些事实，新技术已建立如下。研制了在微光室木桌上几分钟内生成全息图的系统，并对该系统的生成能力进行了测试和评价，确定了该系统具有高的生成能力和高效率。用于同时和光学类比地识别多个形状的系统，即光学模拟计算机，由激光器、用于制作MMSF的光学装置、空间光调制器（SLM）、用于拍摄识别形状图像的CCD相机、用于投影图像的显示器和用于投影参考形状对准的个人计算机作为算法组成。通过对粒子和（或）字母形状的识别实验，证实了新系统可以在光速下同时识别这些形状。为了检测电路板负载电子元件的外观，应用了这种新技术。利用该技术可以同时、即时地识别出电路板上存在的某些缺陷。实验结果表明，该方法适用于密集粒子场中流矢量图像的识别。