A hyperspectral thermal imager based on a low order scanning Fabry-Pérot interferometer

Mads Nibe Larsen; Anders Løchte Jørgensen; Victor Petrunin; Jakob Kjelstrup-Hansen; Bjarke Jørgensen

doi:10.1117/12.3013384

7 June 2024 A hyperspectral thermal imager based on a low order scanning Fabry-Pérot interferometer

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

Proceedings Volume 13030, Image Sensing Technologies: Materials, Devices, Systems, and Applications XI; 130300E (2024) https://doi.org/10.1117/12.3013384
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Conference Poster

Abstract

This work describes a novel hyperspectral imaging system for the long-wave infrared domain. Being a spectral scanner, it is more versatile compared to single-point and push-broom techniques, which require relative movement between instrument and sample to acquire an image. The imager is equipped with a 1024×768-pixel uncooled microbolometer sensor, which is sensitive to wavelengths in the range from 8 to 14 µm. A scanning Fabry-Pérot interferometer is placed in front of the collecting optics. The distance between its two mirrors determines the distribution of wavelengths entering the system. By capturing images at different mirror separation distances, a hyperspectral data cube is formed. The spectral information provided in such a hyperspectral data cube can i.a. be used for material classification, as here demonstrated with an example of different gemstones.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Mads Nibe Larsen, Anders Løchte Jørgensen, Victor Petrunin, Jakob Kjelstrup-Hansen, and Bjarke Jørgensen "A hyperspectral thermal imager based on a low order scanning Fabry-Pérot interferometer", Proc. SPIE 13030, Image Sensing Technologies: Materials, Devices, Systems, and Applications XI, 130300E (7 June 2024); https://doi.org/10.1117/12.3013384

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