Broadband spectrometer with objective comprising an aspheric corrector mirror and a dispersing element traversed twice by the input beam

摘要

The spectrometer comprises at least one first optical path for a beam of electromagnetic radiation, along which the following are arranged: an inlet slit (1) for an incoming beam; a collimator (5) comprising one converging spherical mirror, to collimate the incoming beam; a first disperser (9) for dispersing the beam into its chromatic components; a first focuser (19); and a first detector (21) which receives the dispersed and focused beam from said first focuser. Arranged along the first optical path is at least one first aspheric corrector element (7, 17) comprising an aspheric mirror for correcting the spherical aberration. Furthermore, the disperser is arranged along the optical path in such a way as to be traversed twice by the beam of electromagnetic radiation.