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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 1 — Jan. 1, 2003
  • pp: 18–29

Phase grating design for a dual-band snapshot imaging spectrometer

James F. Scholl, Eustace L. Dereniak, Michael R. Descour, Christopher P. Tebow, and Curtis E. Volin  »View Author Affiliations


Applied Optics, Vol. 42, Issue 1, pp. 18-29 (2003)
http://dx.doi.org/10.1364/AO.42.000018


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Abstract

Infrared spectral features have proved useful in the identification of threat objects. Dual-band focal-plane arrays (FPAs) have been developed in which each pixel consists of superimposed midwave and long-wave photodetectors [DyerTidrow, Conference on Infrared Detectors and Focal Plane Arrays (SPIE, Bellingham, Wash., 1999), pp. 434–440]. Combining dual-band FPAs with imaging spectrometers capable of interband hyperspectral resolution greatly improves spatial target discrimination. The computed-tomography imaging spectrometer (CTIS) [DescourDereniak, Appl. Opt. 34, 4817–4826 (1995)] has proved effective in producing hyperspectral images in a single spectral region. Coupling the CTIS with a dual-band detector can produce two hyperspectral data cubes simultaneously. We describe the design of two-dimensional, surface-relief, computer-generated hologram dispersers that permit image information in these two bands simultaneously.

© 2003 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(090.1970) Holography : Diffractive optics
(090.2870) Holography : Holographic display
(100.6950) Image processing : Tomographic image processing
(110.3080) Imaging systems : Infrared imaging
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation

History
Original Manuscript: May 24, 2002
Revised Manuscript: September 10, 2002
Published: January 1, 2003

Citation
James F. Scholl, Eustace L. Dereniak, Michael R. Descour, Christopher P. Tebow, and Curtis E. Volin, "Phase grating design for a dual-band snapshot imaging spectrometer," Appl. Opt. 42, 18-29 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-1-18

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