Dual-ARM VIS/NIR compressive spectral imager

Compressive spectral imaging (CSI) has demonstrated to be a feasible technique for capturing the 3D spatio spectral information of a scene through less measurements than the Nyquist rate. The coded aperture snapshot spectral imaging (CAS-SI) is an example of a CSI optical architecture, which has been proposed to work on the visible electromagnetic spectrum. Due to the rich information contained in the infrared spectrum, in this paper, we mathematically model and demonstrate the implementation of a broadband CASSI system covering the visible and the near infrared spectra between 448 nm to 1436 nm. Particularly, we developed a Digital Micromirror Device-based CSI system, which implements dual-band CS measurement processes of 3D spatio-spectral scenes.