Fundamental study on development of the technique manipulating particles. small particles by laser beam

1.利用由目镜望远镜组成的光学显微镜，采用暗视场物镜，用YAG激光和He-Ne激光组成的光学显微镜，建立了一种新的光学系统，可以根据被激光捕获在液体中的粒子的衍射图来确定粒子的形状和大小。2.阐明了在辐射力的作用下，被捕获的直径大于1微米的粒子可以通过扫描的激光在大气中的水平面上稳定地操作。3.认识到有一定的可能性，它可以通过Ar激光水平扫描直射光束去除和消除直径大于1微米的颗粒，并通过分析颗粒的衍射图识别技术将各种形状或尺寸的颗粒分离出来。提出了一种新的控制大颗粒形状、大小和种类的技术。4.为了消除大颗粒，必须在激光栅栏中明确地保持激光光束的高斯强度分布。5.在实验中，发现直径在0.1微米以下的烟雾颗粒在所有位置都向入射激光的逆进方向飞行。已经提出了一种新的技术来消除或收集空气中悬浮的小颗粒，如烟雾颗粒或放射性同位素颗粒。

1.By the optical microscope composed with a telescope at eyepiece and, with a dark field object lens and with YAG laser beam and He-Ne laser beam, a new optical system has been developed to manipulate the small particles with determining the shape and size from the diffraction patterns of particles trapped in the liquid by YAG laser beam.2.It was clarified that the trapped particles of which diameter were over 1 mum, by radiation force, could be steadily manipulated by the scanned laser beam in the horizontal plane in the atmosphere.3.It was recognized that there were some possibility, which could remove and eliminate particles of which diameter was over 1 mum by horizontally scanning direct beam of Ar laser, and which could separate the particles in each shape or size with discriminating technique analyzing diffraction pattern from particles. A new manipulation technique for the large particles with determining the shape, size and species was proposed.4.To eliminate the particles, it was clarified that the Gaussian intensity distribution of the laser beam had to be definitely preserved in the laser barrier.5.In experiments, it was recognized that smoke particles of which diameter were under 0.1 mum were sent flying to the anti-progressive direction of incident laser beam at all position. A new technique has been proposed to eliminate or collect the small particles like as smoke particles or radioisotope particles suspended in the air.