Trapping stiffness measurement with brownian motion analysis method at low sampling frequency
低频响及低采样频率下用布朗运动分析法测量光阱刚度

The Brownian motion analysis is a preferable method to investigate the trapping stiffness of optical tweezers system because of its convenience and simplicity. However, there would be obvious deviation if the detector's response frequency or sampling frequency is low. Such problems are discussed and a solution is brought forward in this article.