| 摘要 |
The smoke detector comprises an optical measuring chamber, comprising a sens or arrangement (2) with at least one light source (12, 12'), a light sensor (11 ) and a labyrinth system (7) with diaphragms (16) arranged at the periphery of the measuring chamber. The light sources (12, 12') and the light sensor (11) are each arranged in a housing (14, 15; 13). Said housings (14, 15; 13) have a rectangular form and comprise a small window opening. The at least one light source (12, 12') and the light sensor (11) are arranged in the rear section of the housing (14, 15; 13) and a relatively large separation is formed between the optical surfaces of the at least one light source (12, 12') through whic h light passes and/or the lens of the light sensor (11). Said separation is preferably greater than the diameter of said optical surfaces or said lens. A compact, open dispersion chamber is formed in the measuring chamber between the light exit or entry of the housing (14, 15; 13) and the opposing diaphra gm (16). |
