Patent ID: 9683891
Date: 2017-06-20
CPC Classifications: G01J

Claim:
1. A spectrometer comprising: a refracting surface; and a capturing means at the refracting surface of an interferogram delivered from two interference beams and forming interference lines parallel to each other along a transverse axis of a plane of the refracting surface, the capturing means including an array of detection elements parallel to the plane of the refracting surface and arranged to detect a spatial distribution of the interferogram; wherein the array is a two-dimensional array over an entirety of which the detection elements are disposed equidistantly, and wherein interference lines exhibit an angular shift with the capturing means, the spectrometer further comprising an isosceles prism having a front face and two back faces, arranged so as the refracting surface comprises at least a portion of the back faces of the prism, such that the interference beams arrive at a front face of the prism in normal incidence symmetrically with respect to a median plane of the front face which crosses an edge formed by an intersection of both back faces of the prism.