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physics.ins-det2009★ 89 cited
Power spectrum analysis with least-squares fitting: Amplitude bias and its elimination, with application to optical tweezers and atomic force microscope cantilevers
Simon F. Norrelykke, Henrik Flyvbjerg
Optical tweezers and AFM cantilevers are often calibrated by fitting their experimental powerspectra of Brownian motion. We demonstrate here that if this is done with typical weigh…
physics.ins-det2006★ 59 cited
Power Spectrum Analysis for Optical Tweezers, II: Laser Wavelength Dependence of Parasitic Filtering, and how to Achieve High Band-Width
Kirstine Berg-Sorensen, Erwin J. G. Peterman, Tom Weber +2
In a typical optical tweezers detection system, the position of a trapped object is determined from laser light impinging on a quadrant photodiode. When the laser is infrared and t…