| 摘要 |
A tunable interferometric scanning spectrometer is provided. In one aspect of the disclosure, the interferometric scanning spectrometer splits incoming light beams among different optical paths in the spectrometer, recombines the light beams from the different optical paths to produce combined light beams, detects intensities of the combined light beams across a focal plane (e.g., with a sensor array), and calculates a spectra based on the detected intensities and a filter function that is a function of optical path difference (OPD) between the optical paths. In one aspect, the filter function varies across the focal plane. In another aspect, the spectrometer comprises a rotatable dispersive element (e.g., glass plate) in one the optical paths and/or a moveable mirror in the other optical path. In this aspect, the spectrometer may be adjusted away from zero OPD by rotation of the dispersive element and/or displacement of the mirror. |
