<title>Tunable Fabry-Perot filter for imaging spectroscopy in the infrared</title>

Abstract

We present a new hyperspectral imaging system for the long wave infrared (LWIR) based on a tunable first-order Fabry-Perot Scanning Spectrometer (FPSS). The FPSS operates over 8 -12 µm with a spectral resolution of 1% of the wavelength. The FPSS has a 22 degree field of view and a spatial resolution of 0.11 degrees. The key components of the FPSS system are the collection optics, a tunable Fabry-Perot etalon, optical position sensors, a closed-loop positioning system, an uncooled microbolometer focal plane array, a digital frame grabber card, and a user-friendly Graphical User Interface (GUI).

Hyperspectral Fourier transform spectrometer for reflection spectroscopy and spectral self-interference fluorescence microscopy

“…A number of hyperspectral systems using various forms of tunable spectral filters were also considered. These technologies include tunable Fabry-Perot interferometers [7], acousto-optical tunable filters [8], liquid crystals [9], holographically formed polymer dispersed liquid crystal systems [10], and spectral filter wheels. All of these filters use a form of interference or diffraction to isolate a spectral resolution element along with an FPA to acquire the image in each spectral band.…”