激光悬浮力计算模型分析

Analytic Ray Optics Model for Laser Levitation

在Ａｓｈｋｉｎ的光学悬浮纯几何光线模型的基础上，采用立体解析几何的方法加以改进，对单光束聚焦俘获透明介质小球的作用力进行了分析和数值计算，得出了不同参数条件下光辐射压力的量级。特别地，给出了光的线偏振方向对悬浮力的影响，以及空间微重力条件下悬浮粒子可能的力学行为。

Mechanism of optical levitation is discussed. Based on Ray Optics model developed by A.Ashkin, solid analytic geometry method is adopted to calculate the forces of focused single beam laser trap on micron sized transparent dielectric spheres. Magnitude of radiation pressure under various parameter condition is obtained through numerical computation. Especially, the effect of polarization direction of laser on radiation pressure is studied, and the mechanics behavior of manipulated sphere under micro gravity conditions is predicted.