Optical smoke detector

Details Optical smoke detector Optical smoke detector

G - Physics

08

B

340/140.1

G08B 17/10 (2006.01)

Patent

CA 1118869

35-EL 1386 ABSTRACT OF THE DISCLOSURE A smoke detector is disclosed using a dark field optical system in which an air sample is illuminated and forward scattered light is collected in a zone centered about but exclusing on-axis light. The collected light is then sensed to detect the presence of smoke. The system includes a self-contained light source and a photo detector suitable for operation by a dry cell. The optics are designed for high light gathering efficiency and the internal design minimizes scattered light to achieve maximum smoke detection sensitivity.

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