Jp. Silveira et al., MICROMACHINED METHANE SENSOR-BASED ON LOW-RESOLUTION SPECTRAL MODULATION OF IR ABSORPTION RADIATION, Sensors and actuators. B, Chemical, 48(1-3), 1998, pp. 305-307
We present a new methane sensor based on infrared absorption at 3.3 mu
m. We have designed a modulable interferencial filter to achieve suff
icient selectivity and to eliminate drift and changes on transmission
of optical elements or IR light source emission. This microoptical dev
ice is fabricated using materials and processes available from silicon
technology, thus assuring low production cost. (C) 1998 Elsevier Scie
nce S.A. All rights reserved.