ISIS; An Information-efficient Spectral Imaging System

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Description

A specialized hyperspectral imager has been developed that preprocesses the spectra from an image before the light reaches the detectors. This "optical computer" does not allow the flexibility of digital post-processing. However, the processing is done in real time and the system can examine = 2 x 10{sup 6} scene pixels/sec. Therefore, outdoors it could search for pollutants, vegetation types, minerals, or man-made objects. On a high- speed production line it could identify defects in sheet products like plastic wrap or film, or on painted or plastic parts. ISIS is a line scan imager. A spectrally dispersed slit image is ... continued below

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9 pages

Creation Information

Boye, C.A.; Descour, M.R.; Gentry, S.M.; Grotbeck, C.L.; Stallard, B.R. & Sweatt, W.C. July 19, 1998.

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Description

A specialized hyperspectral imager has been developed that preprocesses the spectra from an image before the light reaches the detectors. This "optical computer" does not allow the flexibility of digital post-processing. However, the processing is done in real time and the system can examine = 2 x 10{sup 6} scene pixels/sec. Therefore, outdoors it could search for pollutants, vegetation types, minerals, or man-made objects. On a high- speed production line it could identify defects in sheet products like plastic wrap or film, or on painted or plastic parts. ISIS is a line scan imager. A spectrally dispersed slit image is projected on a Spatial Light Modulator. The SLM is programmed to take the inner product of the spectral intensity vector and a spectral basis vector. The SLM directs the positive and negative parts of the inner product to different linear detector arrays so the signal difference equals the inner product. We envision a system with one telescope and =4 SLMS.

Physical Description

9 pages

Source

  • Imaging Spectrometry IV, San Diego, CA (US); 07/19/1998-07/24/1998

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  • Other: DE00001262
  • Report No.: SAND--98-2114C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 1262
  • Archival Resource Key: ark:/67531/metadc628360

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • July 19, 1998

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  • June 16, 2015, 7:43 a.m.

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Boye, C.A.; Descour, M.R.; Gentry, S.M.; Grotbeck, C.L.; Stallard, B.R. & Sweatt, W.C. ISIS; An Information-efficient Spectral Imaging System, article, July 19, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc628360/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.