Cerberus Ag

Markus Rossi

Michael T Gale

Rino Ernst Kunz

Kurt A Muller

Peter Ryser

Dieter Wieser

Optical smoke detectors such as extinction smoke detectors and scattered-light smoke detectors include a radiation source, a radiation detector or receiver, and a measurement volume which is in communication with ambient atmosphere and which is traversed by a light path from the radiation source to the radiation receiver. For compactness and simplicity, such an optical smoke detector is provided with a planar-optical element in the optical path. Suitable as planar-optical elements are diffractive elements, e.g., holographic-optical elements (HOE), and micro-Fresnel elements (MFE), e.g., micro-Fresnel reflectors (MFR).

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Ebnat-Kappel, Switzerland

Markus Rossi