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Proceedings Paper

Spectral matching imager using correlation image sensor and variable-wavelength illumination
Author(s): Akira Kimachi; Toshihide Imaizumi; Ai Kato; Shigeru Ando
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Paper Abstract

This paper proposes a spectrally selective imaging system called 'spectral matching imager,' which consists of the variable wavelength monochrome light source and the correlation image sensor. The variable wavelength monochrome light source illuminates the scene while sweeping its wavelength with time to expand the spectral reflectance/transmittance function of objects along the time axis. At each pixel, the correlation image sensor produces the correlation in the time domain between the expanded spectral function and a reference spectral function. Consequently, pixels that establish a good spectral match have large values in the output image. The spectral matching imager satisfies (1) high spectral resolution, (2) efficient data compression, and (3) tunability to arbitrary optical filter characteristics. Experimental results demonstrate successful detection of objects having detailed narrowband structures, such as glass pieces doped with rare-earth elements.

Paper Details

Date Published: 24 April 2002
PDF: 10 pages
Proc. SPIE 4669, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications III, (24 April 2002); doi: 10.1117/12.463414
Show Author Affiliations
Akira Kimachi, Osaka Electro-Communication Univ. (Japan)
Toshihide Imaizumi, Univ. of Tokyo (Japan)
Ai Kato, Univ. of Tokyo (Japan)
Shigeru Ando, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 4669:
Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications III
Nitin Sampat; John Canosa; Morley M. Blouke; John Canosa; Nitin Sampat, Editor(s)

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