+Cantilevers are used inside atomic force microscope which provides high
+resolution images of surfaces. Several technics have been used to measure the
+displacement of cantilevers in litterature. For example, it is possible to
+determine accurately the deflection with optic interferometer~\cite{CantiOptic89},
+pizeoresistor~\cite{CantiPiezzo01} or capacitive
+sensing~\cite{CantiCapacitive03}.