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Proceedings Paper

LED-based spectrometer modules for handheld sensors and online process monitoring
Author(s): Jouko Malinen; Markku Kansakoski
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Paper Abstract

This paper discusses the possibilities of the light-emitting diode technology in view of application as an instrument light source, especially for on-line process analyzers and hand-held optical sensors. The results of comparative measurements carried out on the spectral power output of selected NIR LEDs and incandescent lamps are summarized. Some aspects concerning the technical optimization of LED- based instruments are dealt with, and the availability of commercial LED devices with a wavelength range from visible to mid-IR wavelengths, are briefly covered. Finally, some examples of LED-based multiwavelength light source modules developed at VT T Electronics over the past few years are briefly reviewed. These comprise a multiwavelength LED source for pulp and paper applications, a prototype 7- wavelength LED spectrometer for the 3.4 micrometers region, and a second generation 32-wavelength SWNIR spectrometer unit for high performance analyzer applications.

Paper Details

Date Published: 26 February 1999
PDF: 8 pages
Proc. SPIE 3537, Electro-Optic, Integrated Optic, and Electronic Technologies for Online Chemical Process Monitoring, (26 February 1999); doi: 10.1117/12.341020
Show Author Affiliations
Jouko Malinen, VTT Electronics (Finland)
Markku Kansakoski, VTT Electronics (Finland)


Published in SPIE Proceedings Vol. 3537:
Electro-Optic, Integrated Optic, and Electronic Technologies for Online Chemical Process Monitoring
Mahmoud Fallahi; Mahmoud Fallahi; Robert J. Nordstrom; Terry R. Todd, Editor(s)

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