日本东京大学工程部的泽田嗣郎教授等人研制出可以高精度探测水中浮游非常小的超微粒的热透镜显微镜。 新型显微镜使用了波长不同的两种激光器。在激光束的焦点附近,如果微粒子存在,那么微粒子就吸收光而发热。越是激光斑点 Professor Sawada Saitaro of Engineering Department, University of Tokyo, Japan, and others developed a thermal lens microscope that can detect ultra-fine particles floating very little in water with high precision. The new microscope uses two lasers of different wavelengths. Near the focal point of the laser beam, if the particles are present, the particles absorb light and generate heat. The more the laser spots