Patent ID: 7782455

Claim:
Spectrograph with a tilted detector window comprising: a light source ( 1 ) able to emit a light beam, an entrance slit ( 3 ) able to transmit a part of the light beam emitted by the light source ( 1 ) and to generate a transmitted light beam, a grating ( 4 ) able to diffract the light beam transmitted through the entrance slit ( 3 ) and to generate a diffracted light beam and a spectrum in an image plane (X′, Y′), a detector ( 5 ) able to detect the light beam diffracted by the grating ( 4 ), said detector ( 5 ) comprising a window ( 6 , 11 ) through which the light beam diffracted by the grating ( 4 ) is transmitted, a part of the diffracted light beam generating reflections on the window ( 6 , 11 ) or between the window and the sensitive surface of the detector ( 5 ) contained in a detection plane (X″, Y″), at least a means for inclining able to avoid interference spectra, characterised in that: the at least a means for inclining able to avoid interference spectra comprises the detector window ( 6 , 11 ) which is an inclined detector window ( 11 ).