| 摘要 |
The present invention relates to a spectrometer (100) for analysing the spectrum of an upstream light beam (1), comprising an entrance slit (101) and collimating means (110) suitable for generating, from the upstream light beam, a collimated light beam (10), characterised in that it also comprises: a polarisation-dependent diffraction grating (120) suitable for diffracting, at each wavelength (11, 12) of the spectrum of the upstream light beam, the collimated light beam into a first diffracted light beam (11, 12) and a second diffracted light beam (21, 22); optical recombining means (130) comprising a planar optical reflecting surface (130) perpendicular to the grating and suitable for deviating at least the second diffracted light beam; and focusing means (140) suitable for focusing, at each wavelength, the first diffracted light beam and the second diffracted light beam onto one and the same focusing area (141). |
