Airborne hyperspectral imaging system

Details Airborne hyperspectral imaging system Airborne hyperspectral imaging system

2011-05-17

2011-05-17

Chowdhury, Tarifur (Department: 2886)

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

Reexamination Certificate

active

07944559

ABSTRACT:
A hyperspectral imaging system has fore-optics including primary, secondary and tertiary fore-optics mirrors, and an imaging spectrometer including primary, secondary and tertiary spectrometer mirrors. Light from a distant object is collected by the primary fore-optics mirror, and the tertiary fore-optics mirror forms an intermediate object image at an entrance side of a spectrometer slit. The spectrometer mirrors are configured so that light from an exit side of the slit is diffracted by a grating on the secondary mirror, and an image representing spectral and spatial components of the object is formed by the tertiary spectrometer mirror on a focal plane array. The surface of each mirror of the fore-optics and the spectrometer has an associated axis of symmetry. The mirrors are aligned so that their associated axes coincide to define a common system axis, thus making the imaging system easier to assemble and align in relation to prior systems.

REFERENCES:
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patent: 6100974 (2000-08-01), Reininger
X. Prieto-Blanco, et al., Analytical design of an Offner imaging spectrometer, Optics Express, v. 14, No. 20 (Oct. 2006) at pp. 9156-9168.
F. Reininger, Optics for Compact, High Performance Imaging Spectrometers, Caltech/NASA JPL, <http://m3.jpl.nasa.gov/docs/Offner—spectrometer.pdf>.
C. Simi, et al, Compact Airborne Spectral Sensor (COMPASS), Proc. of SPIE, v. 4381 (2001) at pp. 129-136.
J. Yiquan, et al, Compact hyperspectral imaging system with a convex grating, Proc. of SPIE, v. 6834, 68340Y (2007) at pp. 1-9.

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