System and design requirements in computed tomographic imaging spectroscopy

Harvey C. Schau; Michael R. Descour; Eustace L. Dereniak; Peter T. Spuhler; Curtis Earl Volin

doi:10.1117/12.406602

15 November 2000 System and design requirements in computed tomographic imaging spectroscopy

Harvey C. Schau, Michael R. Descour, Eustace L. Dereniak, Peter T. Spuhler, Curtis Earl Volin

Proceedings Volume 4132, Imaging Spectrometry VI; (2000) https://doi.org/10.1117/12.406602
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

The advent of imaging spectroscopy has enabled optical sensors to be constructed that provide hyperspectral imagery on scales previously unattainable. Whereas multiband imagery on several spectral bands have been available for some time, the new generation of instruments is capable of providing imagery in hundreds or thousands of spectral bands. The price of increased measurement resolution is both greater system complexity, and, increased data processing burden. One of the new instrument designs for producing hyperspectral imagery is the Computed Tomographic Imaging Spectrometer (CTIS). This instrument relies on a computer generated holographic mask as a dispersing element with relatively conventional optical elements and arrays. Design philosophy is discussed relative to systems requirements for using hyperspectral imaging in missile and fire control systems. Issues of optical throughput, dispersion, mask complexity, and, producability are discussed. Results are shown for masks manufactured to operate in the visible and infrared regions. In concert with the design issues of the Computed Tomographic Imaging Spectrometer, the data processing and reduction is discussed both for remote sensing, and, typical missile and fire control applications. System tradeoff between algorithm complexity and mission is presented with regard to current algorithms and their implementation. Completed systems are presented and results from both first and second-generation instruments are displayed. Deviation of actual operation from expectations is discussed relative to plans for further development.

Citation Download Citation

Harvey C. Schau, Michael R. Descour, Eustace L. Dereniak, Peter T. Spuhler, and Curtis Earl Volin "System and design requirements in computed tomographic imaging spectroscopy", Proc. SPIE 4132, Imaging Spectrometry VI, (15 November 2000); https://doi.org/10.1117/12.406602

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KEYWORDS

Diffraction

Imaging systems

Spectroscopy

Imaging spectroscopy

Missiles

Calibration

Tomography

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