Work

Long-wave infrared hyperspectral imager based on a scanning Fabry–Pérot interferometer

Year: 2025

Type: article

Abstract: This work presents a hyperspectral imager sensitive to radiation in the 1250-666 cm-1 wavenumber range (wavelengths between 8 and 15 μm). The system combines a low-order scanning Fabry-Pérot interferometer with a thermal camera utilizing a 1024 × 768-pixel uncooled microbolometer detector. The compact interferometer design enables a relatively small footprint, providing a spectral resolution between 26 and 39 cm-1, depending on the wavenumber. Transmission measurements of various substances are shown to produce distinct interferograms, facilitating material identification. In addition, a generalized matrix method is used to estimate the relationship between physical cavity length and wavenumber of the incident light, enabling the prediction of interferogram shapes.

Source: Review of Scientific Instruments

DOI: 10.1063/5.0242417

Authors: Mads Nibe Larsen, Anders Løchte Jørgensen, Victor Petrunin, Jakob Kjelstrup-Hansen, Bjarke Jørgensen

Institution: University of Southern Denmark

Language: English

Topic: Spectroscopy and Laser Applications

Subfield: Spectroscopy

Field: Chemistry

Domain: Physical Sciences

Open Access status: green

Funder: Innovationsfonden

Award: G3643160501