Acta Optica Sinica, Volume. 31, Issue 10, 1004001(2011)
Method for Displacement Calibration of Four-Quadrant Photodetector in Optical Tweezers System
A method for real-time, quick calibration of four-quadrant photodetector (QD) signals in optical tweezers system is provided. The experimental results indicate that the method is feasible and precise. Its instability is less than 1%. In addition, the effect of the bead depth on calibration factor is investigated experimentally, and it is found that the calibration factor decreases when the bead depth increases. The method can be used to monitor the stability of the optical tweezers system.
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Huang Lu, Guo Honglian, Qu E, Ling Lin, Li Zhaolin, Zhang Daozhong, Li Zhiyuan, Feng Baohua. Method for Displacement Calibration of Four-Quadrant Photodetector in Optical Tweezers System[J]. Acta Optica Sinica, 2011, 31(10): 1004001
Category: Detectors
Received: Mar. 21, 2011
Accepted: --
Published Online: Sep. 29, 2011
The Author Email: Lu Huang (huanglu@aphy.iphy.ac.cn)