The temperatures and compositions of gases in and around flames can be diagnosed using infrared emission spectroscopy to observe molecular band shapes and intensities. We have combined this approach with a low-order scanning Fabry-Perot filter and an infrared camera to obtain spectrally scanned infrared emission images of a laboratory flame and exhaust plume from 3.7 to 5.0 µm, at a spectral resolution of 0.043 µm and a spatial resolution of 1 mm. The scanning filter or AIRIS (Adaptive Infrared Imaging Spectroradiometer) is a Fabry-Perot etalon operating in low order (mirror spacing ~ wavelength) such that the central spot, containing a monochromatic image of the scene, is viewed by the detector array. The detection system is a 128 x 128 liquid-nitrogen-cooled InSb focal plane array. The field of view is controlled by a 50 mm focal length multielement lens and an f/4.8 aperture, resulting in an image 6.4 x 6.4 cm in extent at the flame and a depth of field of ~4 cm. Hyperspectral images above a laboratory CH₄/air flame show primarily the strong emission from CO₂ at 4.3 µm, and weaker emissions from CO and H₂O. We discuss techniques to analyze the spectra, and plans to use this instrument in microgravity flame spread experiments.