Optical Trap Stiffness Online Measurement System Based on FPGA

Peng Fei Li; Jing Li; Chun Li Zhu

doi:10.4028/www.scientific.net/AMM.615.189

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 615Optical Trap Stiffness Online Measurement System...

Optical Trap Stiffness Online Measurement System Based on FPGA

Abstract:

For investigating the mechanical properties of optical tweezers, a data collection/process/control system based on FPGA is designed and developed to measure the optical trap stiffness. A four quadrant detector is used to track the positions of the trapped microsphere, the digital data converted by a high precision ADC is transferred through the USB interface into PC for processing and displaying, and the PC controls an electronically controlled platform to realize zero alignment of the four quadrant detector. Experiments show that this system could be effectively used for on-line optical trap stiffness measurement.

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Periodical:

Applied Mechanics and Materials (Volume 615)

Pages:

189-193

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.615.189

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Online since:

August 2014

Authors:

Peng Fei Li, Jing Li*, Chun Li Zhu

Keywords:

Four Quadrant Detector, FPGA, Optical Trap Stiffness

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