US Patent 9824564 Aspirated smoke detector with improved optical chamber

An aspirated smoke detector with an improved optical chamber is provided. The aspirated smoke detector can include a base, an optical block housed within the base, the optical block housing an emitter and a receiver, and a chamber cover disposed over the base and the optical block to form an optical chamber therebetween. The chamber cover can capture light emitted by the emitter and reflect the captured light within the chamber cover while avoiding multiple back reflections of the captured light.