Title:
OPTICALLY DEVIATED SMOKE DITECTOR
Document Type and Number:
Japanese Patent JPS5357885
Kind Code:
A
Abstract:
An optical smoke detector for pulsed or continuous operation in which optical biasing of a light source and receiving transducer is employed to permit operation of the detector at points of greater sensitivity, stability and linearity than are found at low light levels. The optical biasing may be provided by a light-scattering optical integrator associated with the light source causing controlled impingement of light upon the field of view of the receiving transducer. Adjustment of the relative positions of the light source and transducer and of the disposition of a barrier between those elements as well as the holders of those elements provides further control of the optical biasing. The housing of the detector is provided with smoothly contoured passages for the unimpeded passage of smoke particles to an internal optical detection chamber.
Inventors:
ERAIASU II SOROMON
Application Number:
JP366477A
Publication Date:
May 25, 1978
Filing Date:
January 18, 1977
Export Citation:
Assignee:
SOLOMON ELIAS E
International Classes:
G01N21/53; G08B17/10; G08B17/107; (IPC1-7): G01N21/26