A STUDY ON VIVIDNESS OF UNDERWATER OPTICAL MICROSCOPE IMAGE WITH HIGH MAGNIFICATION AND STEREOSCOPIC DISPLAY SYSTEM

光学显微镜的缺点是只能聚焦有限的深度。为了解决这一问题，本研究开发了基于光学显微镜的立体显示系统。即利用图像处理技术，从多幅深度稍有不同的图像中提取出聚焦区域，然后利用这些聚焦区域合成一组立体图像。本研究旨在解决该系统在实际应用中存在的问题，降低图像处理速度，以观察水泥矿物水化过程中水泥矿物形态的变化。通过引入本研究购买的图形工作站，可以将图像提取和处理所需的时间减少到三分之一。采用可浸入液体的物镜，既解决了物镜的防水问题，又解决了样品在水中的固定问题。在固定样品时，先在玻片上用硅橡胶制成一个盒子，然后将样品和水注入盒子。使用这种方法，样品在观察过程中不会在水中移动。将30 W卤素灯改为50 W卤素灯，保持高倍光学显微镜的视场亮度。通过图像处理消除了观察样品时产生的色散现象。通过对水泥矿物与不同类型混合水的水化过程的观察，发现体系的速度足够快，可以观察到铝酸钙水化物的形态变化，而要观察到硫铝酸钙水化物的形态变化，需要更快的速度。

Optical microscopes have the disadvantage that only a limited depth can be focussed. In order to cope with disadvantage, the stereoscopic display system using optical microscopes has been developed in this study. That is, by using image processing techniques, focussed areas are extracted from multiple images taken on slightly different depths, and a set of stereoscopic images is then synthesized using these focussed areas. This study aims to solve problems when the system is used in practice and to reduce the speed of image processing in order to observe changes in morphology of cement minerals during hydration of cement minerals.The time needed for extracting and processing image was able to be reduced to one third by introducing graphics workstation purchased in this study. Use of objective lens which could be immersed in liquid solved the problems of both waterproofing of abjectivelens and fixing of samples in water.Concerning fixing of samples, a box was made with silicone rubber on a slide glass before sample and water were injected into the box. By using this method, samples did not move in water during observation.Brightness of field in optical microscope with high magnification was kept by changing 30 W of halogen lamp into 50 W of halogen lamp. Halation occurring in observation of samples was eliminated by image processing.As a result of observing hydration process of cement minerals with defferent types of mixing water, it was clarified that speed of the system was fast enough to observe changes in morphology of calcium aluminate hydrates, while faster speed was needed in order to observe changes in morphology of calcium sulphoaluminate hydrates.