| 摘要 |
An imaging method for a large-aperture spatial heterodyne interference spectrum and a spectrometer. The method comprises: after compound light passes through a beam splitter (73), reflecting one part of the compound light to obtain reflected light, and transmitting the other part of the compound light to obtain transmitted light; the reflected light reaching an imaging mirror (78) after passing through a reflector group (74, 75) and a blazed grating group (76, 77) and being reflected by the beam splitter (73) once again, and the transmitted light reaching the image mirror (78) along an optical path opposite to the reflected light after passing through the reflector group (74, 75) and the blazed grating group (76, 77), wherein the blazed grating group (76, 77) comprises a first blazed grating (76) and a second blazed grating (77) which are arranged in parallel, the compound light incident in the blazed grating group (76, 77) is diffracted into a plurality of beams of emergent light parallel with each other, and the plurality of beams of emergent light are parallel with the incident light; and obtaining interference light having lateral shearing displacement on the imaging mirror (78), thereby obtaining interference information on a detector (79). The characteristic of adding a pair of parallel blazed gratings to realize heterodyne realizes the reduction of the number of sampling points and the increase of signal-to-noise ratio. |
