Broadband high-spectral-resolution ultraviolet-visible coherent-dispersion imaging spectrometer

A coherent-dispersion imaging spectrometer combining imaging, interferometric spectroscopy and dispersive spectroscopy is presented, which is a unique concept to greatly reduce the multiplex disadvantage of existing ultraviolet-visible multiplexed spectroscopy while achieving imaging combined with high spectral resolution (e.g., 0.01 nm at 220 nm together with 0.1 nm at 700 nm, or higher) for a broadband spectral range. Each unit of the entrance slit is imaged on a given column of a detector, and different wavelengths are dispersed across different rows of that column. For each slit unit, multiple interferograms are generated simultaneously in one scan period, each interferogram with a separate wavelength range and located in a separate pixel of the detector. The expressions for the coherent-dispersion imaging are given, the preliminary design calculations are illustrated by an example, and the numerical simulations for the interferogram and spectrum are shown. This design will be suitable for broadband high-spectral-resolution ultraviolet-visible spectral imaging.