Adaptive spectra-selective imaging by real-time photoconductor bias modulation

The recent research is focused on developing new spectral information processing techniques for adaptive, real-time analysis in the optoelectronic domain. We implement a Fourier transform spectrometer (FTS) that generates a time-varying interferogram signal containing all spectral information in a pixel. The correlation with a set of known spectra is performed in the time-domain by measuring interferograms with a photodetector, multiplying them by electrical reference interferograms that represent the known spectra, and integrating. This architecture eliminates unnecessary data in the optoelectronic front end, enabling extremely simple spectra-selective detection arrays.