Method and apparatus for optical remote detection of a gas located in an observed spatial zone

摘要

Method and apparatus for remote optical detection of a gas present in a region observed, by means of a camera or a thermal imager (10), comprising one or more elements (16) sensitive to the fluxes radiated in a specified wavelength band, an optical unit (12) forming an image of at least one part of the region observed on the sensitive element or elements (16), and two filters (14) which can be interposed on the optical axis of the camera, these filters having similar transmission bands, one of which includes a characteristic absorption line of the gas under investigation, and the other of which is complementary to this absorption line. …??The invention applies in particular to the remote monitoring of the atmosphere around industrial sites. …IMAGE…