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由于可实现对生物样品的非接触、无损伤操纵及可进行微作用力、微小位移的定量测定等优点，光镊己引起人们的热切关注，并作为一种新兴的技术手段正日益广泛地在生物医学研究领域得到广泛应用．光作用力的理论分析与数值计算对光镊系统的建立及实验操作具有指导性的意义，因此?
Optical tweezers have aroused people’s keen interest as a result of the non-contact, non-invasive manipulation of biological samples and the quantitative determination of micro-forces and micro-displacements. As an emerging technological means, Biomedical research has been widely used. The theoretical analysis and numerical calculation of light force have guiding significance to the establishment and experimental operation of optical tweezers system.