Dual-shearing interferometer for multi-modal hyperspectral imaging

A dual-shearing interferometer (DSI) for multimodal hyper-spectral imaging is presented. Two orthogonally stacked pairs of coherent beams are generated by a pair of novel, to the best of our knowledge, birefringent lateral shear-ing splitters. Consequently, two sets of interferograms with full pixel resolution are captured alternately in a time sequence in the double Nyquist frequency mode. Modals of dual-field-of-view hyperspectral imaging and differential-polarization hyperspectral imaging are introduced, and verification experiments are performed. The feasibility of other modals is discussed. The proposed method can effec-tively improve the instrument's performance in terms of the field of view, polarization, spectral resolution, and spectral range.(c) 2023 Optica Publishing Group

Automated summary

This paper presents a dual-shearing interferometer (DSI) for multimodal hyperspectral imaging. Two pairs of orthogonally stacked coherent beams are generated by novel birefringent lateral shear-ing splitters. Two sets of interferograms with full pixel resolution are captured alternately in a time sequence in the double Nyquist frequency mode. The feasibility of other modes is discussed, and the proposed method improves the instrument's performance in terms of field of view, polarization, spectral resolution, and spectral range.