Patent ID: 7804593
Filing Date: 2010-09-28
Classification: G01J

Abstract:
1. A spectrometer assembly comprising: a light source emitting radiation, the radiation having a wavelength spectrum in a first and second wavelength range; a housing with an entrance slit; an Echelle grating for spectrally dispersing said radiation entering through said entrance slit in a main dispersion direction into a plurality of orders; a dispersion element for separating said orders by means of spectrally dispersing said radiation in a lateral dispersion direction, said lateral dispersion direction forming an angle with said main dispersion direction of said Echelle grating and thereby generating a two dimensional spectrum with said plurality of orders being separated from each other; an imaging optical system for imaging said two dimensional spectrum onto an imaging plane; a detector array with a two-dimensional arrangement of a plurality of detector elements in said imaging plane, wherein said Echelle grating, dispersion element and imaging optical system forming a first spectrometer for generating said radiation spectrum in said first wavelength range of said light source on said detector; a further spectrometer providing a further dispersion element and a further imaging optical system for the generation of a radiation spectrum in said second wavelength range which is different from said first wavelength range said detector.