NASA Technical Reports Server (NTRS) 20110004223: Color camera computed tomography imaging spectrometer for improved spatial-spectral image accuracy

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United States Patent
(12) (1o) Patent No.: US 7,876,434 B2
Wilson et al. (45) Date of Patent: Jan. 25, 2011
(54) COLOR CAMERA COMPUTED 6,104,488 A * 8/2000 LeVan ........................ 356/328
TOMOGRAPHY IMAGING SPECTROMETER 6,522,403 B2 * 2/2003 Wilson et al . ............... 356/328
FOR IMPROVED SPATIAL-SPECTRAL 7,092,088 B2 * 8/2006 Schau ........................ 356/328
IMAGE ACCURACY 2002/0175286 Al* 11/2002 Murguia ................ 250/339.07
2006/0050391 Al* 3/2006 Bacldund et al ............. 359/573
2006/0158645 Al* 7/2006 Maier et al .................. 356/301
(75) Inventors: Daniel W. Wilson, Montrose, CA (US);
2006/0170920 Al 8/2006 Granger
Gregory H. Bearman, Pasadena, CA
2006/0252070 Al* 11/2006 Boege et al . ................... 435/6
(US); William R. Johnson, Pasadena,
2006/0274308 Al* 12/2006 Brady et al . ................ 356/326
CA (US)
OTHER PUBLICATIONS
(73) Assignee: California Institute of Technology,
Hartke et al., "Hyperspectral-dual spectral region imaging spectrom-
Pasadena, CA (US)
eter," Proceedings ofSPlE, vol. 5563, pp. 156-166, 2004.
Johnson et al., "All-reflective snapshot hyperspectral imager for
(*) Notice: Subject to any disclaimer, the term of this ultraviolet and infrared application," Optics Letters, vol. 30, No. 12,
patent is extended or adjusted under 35 Jun. 15, 2005.
U.S.C. 154(b) by 358 days. Hartke et al., "Non-scanning dual infrared band hyperspectral imag-
ing spectrometer design," Proceedings ofSPlE, vol. 6295, 12 pages,
(21) Appl. No.: 11/638,036 2006.
Johnson et al., "Spatial-spectral modulating snapshot hyperspectral
(22) Filed: Dec. 12, 2006 imager," Applied Optics, vol. 45, No. 9, Mar. 20, 2006, pp. 1898-
1908.
(65) Prior Publication Data
* cited by examiner
US 2007/0165223 Al Jul. 19, 2007
Primary Examiner Kara E Geisel
(74) Attorney, Agent, or Firm—Christie, Parker & Hale, LLP
Related U.S. Application Data
(60) Provisional application No. 60/749,656, filed on Dec. (57) ABSTRACT
12, 2005.
Computed tomography imaging spectrometers ("CTIS"s)
(51) Int. Cl. having color focal plane array detectors are provided. The
GOIJ3128 (2006.01) color EPA detector may comprise a digital color camera
(52) U.S. Cl . ...................................................... 356/328 including a digital image sensor, such as a Foveon X38
digital image sensor or a Bayer color filter mosaic. In another
(58) Field of Classification Search .................. 356/328
embodiment, the CTIS includes a pattern imposed either
See application file for complete search history.
directly on the object scene being imaged or at the field stop
(56) References Cited aperture. The use of a color EPA detector and the pattern
improves the accuracy of the captured spatial and spectral
U.S. PATENT DOCUMENTS
information.
5,159,199 A * 10/1992 LaBaw .................. 250/339.02
5,760,899 A * 6/1998 Eismann ..................... 356/326 24 Claims, 11 Drawing Sheets
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