Dual-channel spectral imaging with spectral zooming capability

Bing Chen; Michael R. Wang; Jame J. Yang

doi:10.1117/12.800481

27 August 2008 Dual-channel spectral imaging with spectral zooming capability

Bing Chen, Michael R. Wang, Jame J. Yang

Proceedings Volume 7086, Imaging Spectrometry XIII; 70860M (2008) https://doi.org/10.1117/12.800481
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

Abstract

In this paper, a dual-channel spectral imaging system with agile spectral band access and spectral bandwidth tuning capability is presented. A diffractive grating is used as the spectral dispersion element for the dual-channel spectral imaging system. A 4-f spectral filtering channel using an adjustable slit is set up at the first diffraction order of the grating to realize coarse spectral band selection. An acousto-optic tunable filter selectively filters the spectrum of the non-dispersed zero order to realize fine spectral imaging. The spectral zooming function is achieved without increasing spectral frame number facilitating real-time spectral imaging operation. Feasibility of the spectral imaging has been demonstrated through preliminary experiments. Minimum 6 nm spectral resolution and 1.2° field of view have been achieved. The real-time spectral imaging capable of wide spectral band operation without loosing desired fine spectral capability is particularly useful for a variety of defense, medical, and environmental monitoring applications.

Citation Download Citation

Bing Chen, Michael R. Wang, and Jame J. Yang "Dual-channel spectral imaging with spectral zooming capability", Proc. SPIE 7086, Imaging Spectrometry XIII, 70860M (27 August 2008); https://doi.org/10.1117/12.800481

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KEYWORDS

Imaging spectroscopy

Spectral resolution

Imaging systems

Optical filters

Diffraction

Diffraction gratings

Image filtering

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