Optical detector of a value of an atmospheric physical quantity representative of a danger

Abstract

The optical detector of a value of an atmospheric physical quantity representative of a danger includes: a measurement chamber accessible to the atmosphere; an electronics compartment for receiving electronics for detecting the value of the atmospheric physical quantity representative of a danger, the detecting electronics including electronic elements comprising at least: a light emitter, a light receiver that is sensitive to at least some of the wavelengths of the light rays emitted by the emitter, and electronics for processing detection signals, the detector in addition including: a first light guide facing the emitter in order to direct the light emitted by the emitter from the electronics compartment to a detecting zone in the measurement chamber; and a second light guide facing the receiver in order to direct light originating from said detecting zone to the electronics compartment in order to be received by the receiver, the amount of light received by the receiver being representative of the presence/absence in the detecting zone of said physical-quantity value representative of a danger. The electronics compartment is separated from the measurement chamber, and isolates all of the electronic elements that it contains from the atmosphere and the light guides are arranged to penetrate the electronics compartment in a way that is seal-tight to the atmosphere.

Dependencies are inferred from the claim text.