SWIR variable dispersion spectral imaging sensor

F. D. Shepherd; J. M. Mooney; T. E. Reeves; D. S. Franco; J. E. Murguia; C. Wong; P. Dumont; F. Khaghani; G. Diaz; M. M. Weeks; D. Leahy

doi:10.1117/12.740364

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12 September 2007 SWIR variable dispersion spectral imaging sensor

F. D. Shepherd, J. M. Mooney, T. E. Reeves, D. S. Franco, J. E. Murguia, C. Wong, P. Dumont, F. Khaghani, G. Diaz, M. M. Weeks, D. Leahy

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Proceedings Volume 6660, Infrared Systems and Photoelectronic Technology II; 66600J (2007) https://doi.org/10.1117/12.740364
Event: Photonic Devices + Applications, 2007, San Diego, California, United States

Abstract

A novel spectral imaging sensor based on dual direct vision prisms is described. The prisms project a spectral image onto the focal plane array of an infrared camera. The prism set is rotated on the camera axis and the resulting spectral information is extracted as an image cube (x, y, λ), using tomographic techniques. The sensor resolves more than 40 spectral bands (channels) at wavelengths between 1.2 μm and 2.5 μm wavelength. The sensor dispersion characteristic is determined by the vector sum of the dispersions of the two prisms. The number of resolved channels, and the related signal strength per channel, varies with the angle between the prism dispersion axes. This is a new capability for this class of spectral imaging sensor. Reconstructed short-wave imagery and spectral data is presented for field and laboratory scenes and for standard test sources.

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F. D. Shepherd, J. M. Mooney, T. E. Reeves, D. S. Franco, J. E. Murguia, C. Wong, P. Dumont, F. Khaghani, G. Diaz, M. M. Weeks, and D. Leahy "SWIR variable dispersion spectral imaging sensor", Proc. SPIE 6660, Infrared Systems and Photoelectronic Technology II, 66600J (12 September 2007); https://doi.org/10.1117/12.740364

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