Five New Bandpass Filters for Pyroelectric Detectors
Set up Your Detector for Different Gas Measurements
The CO2 filter A with an lpeak = 4.265 μm is the filter with the best possible signal and simple linearization (FWHM = 110 nm).
Water vapour is in almost every gas mixture, which often leads to a disturbing background noise. An attempts to measure this with a 2.94 μm filter, for example, lead to problems of cross-sensitivity with CO2. The M filter has proven more reliable in such practical applications: lpeak = 5,78 μm, FWHM = 180 nm.
Methane is primarily measured at 3.33 μm; however, this is not particularly specific. An excellent alternative is the S filter, which operates at a longer-wave band: lpeak = 7,91 μm, FWHM = 160 nm.
Breath alcohol measurement is becoming more and more popular. The new standard filter has the following specifications: lpeak = 9,50 μm, FWHM = 450 nm.
LASER COMPONENTS GmbH
LASER COMPONENTS specializes in the development, manufacture, and sale of components and services in the laser and optoelectronics industry. At LASER COMPONENTS, we have been serving customers since 1982 with sales branches in five different countries. We have been producing in house since 1986 with production facilities in Germany, Canada, and the United States. In-house production makes up approximately half of our sales revenue. A family-run business, we have more than 200 employees worldwide.
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