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Applied Optics

Applied 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)

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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

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

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)

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  1. M. R. Descour, E. L. Dereniak, “Computed-tomography imaging spectrometer: experimental calibration and reconstruction results,” Appl. Opt. 34, 4817–4826 (1995). [CrossRef] [PubMed]
  2. C. E. Volin, J. P. Garcia, E. L. Dereniak, M. R. Descour, T. Hamilton, R. McMillan, “Midwave-infrared snapshot imaging spectrometer,” Appl. Opt. 40, 4501–4506 (2001). [CrossRef]
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  5. A number of spectral libraries can be accessed from the Internet from the USGS. The main web address is http://speclab.cr.usgs.gov/spectral-lib.html .
  6. C. L. Coleman, “Computer generated holograms for free-space optical interconnects,” Ph.D. dissertation (Optical Sciences Center, University of Arizona, Tucson, Ariz., 1998), Chap. 3.
  7. G. H. Golub, C. F. Van Loan, Matrix Computations, 3rd ed. (Johns Hopkins University Press, Baltimore, Md., 1996).
  8. H. H. Barrett, K. M. Myers, Foundations of Image Science: Mathematical and Statistical Foundations, (Wiley, Hoboken, N. J., 2003), (to be published).
  9. M. R. Descour, C. E. Volin, E. L. Dereniak, T. M. Gleeson, M. F. Hopkins, D. W. Wilson, P. D. Maker, “Demonstration of a computed-tomography imaging spectrometer using a computer-generated hologram disperser,” Appl. Opt. 36, 3694–3698 (1997). [CrossRef] [PubMed]

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