Resolution of cross-type optical particle separation.
Resolution of cross-type optical particle separation.
复制标题
十字型光学粒子分离的分辨率。
DOI：
10.1021/ac800740b
复制
发表时间：
2008
影响因子：
7.4
通讯作者：
S. S. Kim
中科院分区：
文献类型：
--
作者：
Sang Bok Kim;S. Y. Yoon;H. Sung;S. S. Kim
本文从理论和实验上研究了一种实时、连续的光学粒子分离方法--十字型光学粒子分离法。通过求解粒子动力学方程，预测了十字型光学分离粒子的运动轨迹，并与实验数据进行了比较。对于各种流速和颗粒尺寸，测量保留距离，其中垂直于流体流动方向的位移被称为保留距离。测量的保留距离与理论预测吻合良好。由于辐射力，保持距离随着颗粒尺寸的增加而增加，但是随着流速的增加而减小，因为颗粒在激光束中的停留时间随着流速的增加而减小。为了评估十字型光学颗粒分离方法的性能，基于尺寸的分离分辨率从理论上推导出颗粒的折射率和仪器波动。此外，最大分辨率的表达式推导。
A real-time, continuous optical particle separation method, termed cross-type optical particle separation, is investigated theoretically and experimentally. The trajectory of a particle subject to cross-type optical particle separation is predicted by solving the particle dynamic equation and compared with experimental data. For various flow velocities and particle sizes, the retention distances are measured where the displacement perpendicular to the fluid flow direction is referred to as the retention distance. The measured retention distances are in good agreement with theoretical predictions. The retention distance increases as the particle size increases due to the radiation force, but decreases as the flow velocity increases since the residence time of a particle in the laser beam decreases with increasing flow velocity. To evaluate the performance of the cross-type optical particle separation method, size-based separation resolution is derived theoretically in terms of the refractive index of the particle and instrumental fluctuations. Furthermore, an expression for the maximum resolution is derived.