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.
With the development of spectral imaging technology and polarization imaging technology, capturing
the spectral profile and polarization signatures simultaneously will provide a wealth of evidence which
helps to recognize the objects. Thus it has become a new trend in the area of remote sensing technology.
In this paper, the existing polarization spectral imaging technologies are introduced and compared a
new designing scheme to realize the miniaturized hyper-spectral and full-polarization imager are
proposed, which is based on the combination of Acousto-Optic Tunable Filter (AOTF) and Liquid
Crystal Variable Retarder (LCVR). The designing scheme is mainly composed of three modules: the
spectral splitting module based on AOTF, the polarization control module based on LCVR and the
image acquisition module based on Charge Coupled Device (CCD). The use of AOTF assists in
achieving a hyper-spectral resolution higher than 5nm, as well as the abundant spectral information.
While the LCVR enables us to gain multiple sets of polarization images of the target, after that, the
polarization state of the target can be extracted according to Stokes vector and Mueller matrix. This
designing scheme ensures a wide spectral range from 400nm to 2400nm by means of electronic tuning,
and also achieves the hyper-spectral and full-polarization images of the target in rapid succession
without mechanical moving parts. Besides, the development, testing, calibration and test scheme of the
system are also introduced in the rest of the paper.