Method for operating an optical smoke detector and optical...

Details Method for operating an optical smoke detector and optical... Method for operating an optical smoke detector and optical...

G - Physics

08

B

340/140.1

G08B 17/107 (2006.01) G08B 29/24 (2006.01)

Patent

CA 1331649

ABSTRACT METHOD FOR OPERATING AN OPTICAL SMOKE DETECTOR AND OPTICAL SMOKE DETECTOR FOR THE METHOD A method for operating an optical smoke detector, wherein for smoke detecting purposes at least one light sensitive receiver within a detection chamber measures the useful scattered radiation which emanates from a volume unit within said chamber which is located in the intersecting area of the collimated field of view of said receiver and of the collimated beam of a light source within said chamber, said receiver sensing the scattered radiation caused by a contamination of said chamber or a second light sensitive receiver detecting the radiation reflected from a surface unit of said chamber, respectively, whereby measuring the reflexion radiation emanating from an illuminated surface unit within said chamber.

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