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。针对这一缺点，本研究开发了基于光学显微镜的立体显示系统。也就是说，通过使用图像处理技术，从在略有不同深度上拍摄的多个图像中提取聚焦区域，然后使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，以便观察水泥矿物水化过程中水泥矿物形态的变化，通过引入本研究中购买的图形工作站，能够将图像提取和处理所需的时间减少到三分之一。利用可浸泡在液体中的物镜解决了样品的防水和样品在水中固定的问题。在样品固定方面，先用硅橡胶在载玻片上制作盒子，然后将样品和水注入盒子中。利用该方法，样品在观察过程中不会在水中移动，通过将30W的卤素灯改为50W的卤素灯，保持了高倍率光学显微镜的视场亮度。通过对不同混合水类型水泥矿物水化过程的观察，说明该系统的速度足够快才能观察水化铝酸钙的形态变化，而观察硫铝酸钙水化产物的形态变化需要较快的速度。

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.