Calibration of programmable spectral imager with dual disperser architecture

We present a hyperspectral imager with a dual disperser architecture, which is highly re-configurable thanks to the use of a digital micro-mirror device (DMD). The system has over 200 spectral bands in the range 400–700 nm, and 2048 by 2048 spatial pixels. We describe a method to calibrate the instrument and quantify its performance using a simple slit scanning acquisition scheme, and discuss various methods to remove artifacts in the spectral datacube via post-processing. This prototype instrument is designed for simplicity, and aims to explore new acquisition schemes that exploit the property of colocation and use the programmable nature of the DMD to increase the speed of datacube retrieval and the quality of the hyperspectral data.