| 摘要 |
The present invention relates to an apparatus and method of determining particulate integrated properties consisting of integrated volume concentration, integrated surface area concentration and aerosol extinction coefficient in the infrared portion of the light spectrum using a noncollimated light beam irradiating suspended particulates. A light trap is placed in front of the lens that collects the light scattered by the particulates. Two separate detectors are placed differently with respect to the noncollimated beam to measure the light scattered by the particulates. Variable transmission filters are placed in front of the detectors to correct for the distortions in the light scattered by the particulates due to the off-axis intensity of the noncollimated beam.
|
