Verification of programmable, large-FOV spectral imaging technology based on a staring/scanning area-array detector

Abstract

Different objects require different imaging spectra, and a high-temporal-resolution imaging spectrometer has further requirements for producing a large field of view(FOV). For these reasons, we present a new system based on a staring/scanning area-array detector to allow for wide-FOV imaging, along with an acousto-optical tunable filter (AOTF) to impart quick, programmable selection of spectra. Using AOTF as a dispersive component and a turntable as the motion platform, we designed a staring, spectral-programmable imaging prototype with a working band of 400~1000 nm. Besides, we could obtain a large FOV by image mosaic. We performed imaging experiments and image processing for an initial verification of this technique. This technical solution can be used not only for VNIR, but also in SWIR, MWIR, and other bands; it adapts to spectral and FOV requirements for varying subjects, and provides an advanced technical means for further application of high-resolution spectral imaging.

Wide-angle spectral imaging using a Fabry-Pérot interferometer

“…In 2004, Zhang et al [3] built an interference imaging spectrometer making use of a complex modified Savart polariscope that can reach a full field of view (FOV) of 20 • to 30 • operating in the visible range. Recently Xu et al [4] published a turntable system using an acousto-optical tunable filter that can scan a full FOV of less than 40 • , operating from 450 nm to 950 nm with a spectral resolution of 2 nm to 8 nm. In this paper we will study designs with a full FOV of 90 • that consist only of four components (including the spectral filter).…”