31 December 1993 Nondispersive and multichannel analyzers based on mid-IR LEDs and arrays
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Proceedings Volume 2069, Optical Methods for Chemical Process Control; (1993) https://doi.org/10.1117/12.166278
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States
This paper briefly describes the fabrication of infrared light emitting diodes by liquid phase epitaxy including both InGaAs LEDs for emission wavelengths from 2.5 to 3.8 micrometers and InAsSbP for wavelengths from 3.8 to 4.7 micrometers . Some of the first applications of these LEDs in spectroscopic instrumentation are described together with the main instrument characteristics. Nondispersive analyzers have been developed for CH4 and CO detection utilizing LED sources emitting at 3.3 and 4.7 micrometers , respectively. A novel infrared spectrometer construction has been developed based on a linear LED array emitting at 3.3 micrometers and a fixed grating monochromator. This miniature construction can be used as an electrically scanned spectrometer module in future IR analyzers for portable and process on- line applications.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jouko Malinen, Jouko Malinen, Tapio Hannula, Tapio Hannula, Nonna V. Zotova, Nonna V. Zotova, Sergey A. Karandashev, Sergey A. Karandashev, I. I. Markov, I. I. Markov, Boris A. Matveev, Boris A. Matveev, Nikolai M. Stus, Nikolai M. Stus, Georgii N. Talalakin, Georgii N. Talalakin, } "Nondispersive and multichannel analyzers based on mid-IR LEDs and arrays", Proc. SPIE 2069, Optical Methods for Chemical Process Control, (31 December 1993); doi: 10.1117/12.166278; https://doi.org/10.1117/12.166278

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