Wide-band spectrometer with objective comprising an aspherical corrector mirror

摘要

The spectrometer comprises at least a first optical path for a beam of electromagnetic radiation, along which the following are set: a beam-entry slit ( 1 ) for an incoming beam; a collimator ( 5 ) comprising a convergent spherical mirror for collimation of the incoming beam; a first dispersor ( 9 ) for dispersion of the beam into its chromatic components; a first focusing system ( 19 ); and a first detector ( 21 ) which receives the beam dispersed and focused by said first focusing system. Set along the first optical path there is set at least one first aspherical corrector element ( 7; 17 ) comprising an aspherical mirror for correction of spherical aberration.