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The single particle tracking system
2010
Optical Trapping and Optical Micromanipulation VII
In an optical tweezers system, the force measurement with a resolution less than pico-Newton can be achieved by precise measurement and analysis of the trapped particle trajectory. Typically, this single particle tracking technique is realized by a quadrant position sensor which detects the scattering lights of the trapping laser beam from the trapped particle. However, as the radius of the trapped particle is larger than the wavelength of the trapped laser, the scattering pattern becomes
doi:10.1117/12.860934
fatcat:g4xij5xypbhcxnose4fajsq44y