最近,日本理化学研究所的横田秀夫研究员等开发了能够精密检查金属之类硬质物质内部结构的显微镜。检查时,将金属零件等切成厚度为0.5μm的圆形薄片,由多个拍摄照片制作立体图像,可以发现其他方法无法检查出来的金属中的微小气泡。这种新开发的显微镜,在试样放置部分带有转速为 Recently, Yokota Hideo researcher at the Japan Institute of Chemistry and Chemical Engineering developed a microscope capable of precisely examining the internal structure of hard substances such as metals. During the inspection, the metal parts and the like are cut into a round sheet having a thickness of 0.5 μm, and three-dimensional images are made from a plurality of shots to find minute bubbles in the metal which can not be detected by other methods. The newly developed microscope, with the sample placed at a speed of