One-dimensional-ultrawide-field-of-view ultrahigh-spectral-resolution broadband dispersive-coherence imaging spectrometer

A one-dimensional-ultrawide-field-of-view ultrahigh-spectral-resolution broadband dispersive-coherence imaging spectrometer (DCIS) is presented, which comprises an imaging microlens array, multiple optical fibres, a collimating microlens array, a grating-beamsplitter interferometer (GBSI), a cylindrical lens, and an area-array detector. The grating serves not only as a beam-splitter of the GBSI, but also as a dispersive element. The light from a single target unit simultaneously generates multiple interferograms for one scanning cycle, each interferogram covering a separate narrow wavelength range, and the sum of the spectra recovered from all the interferograms constitutes a broad-band spectrum. Combining the outputs of all the imaging microlenses yields a one-dimensional ultra-wide field of view (e.g. 120°). The interferograms and spectra are simulated by two examples with the spectral range of 250 nm to 400 and 500 nm to 800 nm. The proposed DCIS will be suitable for one-dimensional-ultrawide-field-of-view ultrahigh-spectral-resolution broadband spectral imaging in the ultraviolet–visible spectral region.