Liu, JinquanCallegari, AndreaStark, MartinChergui, Majed2009-03-182009-03-182009-03-18200810.1016/j.ultramic.2008.08.009https://infoscience.epfl.ch/handle/20.500.14299/36199WOS:000261750500011We have developed a simple and accurate method for calibrating the amplitude of vibration of quartz tuning fork sensors commonly used in at. force- and near field optical-microscopy. Unlike interferometric methods, which require a complex optical setup, the method we present requires only a simple measurement of the electro-mech. properties of the tuning-fork oscillator and can be performed in a matter of minutes without disturbing the exptl. setup. Comparison with interferometric methods shows that an accuracy of better than few percent can be routinely achieved.text::journal::journal article::research article