The invention is based on the knowledge that the quasi-static deflection of a dispersive element can also be obtained in a miniaturization, in that a higher degree of insusceptibility against vibration and shock can be obtained when a suspension is used for the dispersive element, which biases the same into a resting position, as well as for the deflection a means for holding the dispersive element in a deflected position, such that an equilibrium of powers is established between the holding force and the biasing force. In that way, after shock and vibration, the dispersive element always returns to the position defined by the holding force. Therefore, an inventive spectrometer comprises a dispersive element for spectrally decomposing a light beam, whose spectral distribution is to be determined, into spectral components, as well as a suspension for supporting the dispersive element and for biasing the same into a resting position with a biasing force, when the dispersive element is in a deflected position. A control means controls a holding means to vary the deflected position, so that different spectral components become detectable for a detector of the spectrometer.