DE102015101639A1
Abstract
A method for evaluating the time-resolved intensity profile of an object to be measured radiation associated radiation is to allow a particularly favorable and reliable way, a detection of the useful portion in the measured intensity values and a suppression or reduction of the noise component. For this purpose, according to the invention, the radiation in a beam splitter (22, 24, 26) is split into at least two partial beams (8, 28), wherein for each partial beam (8, 28) its time-resolved intensity profile in a detector (10, 12, 30, 32, 34, 36), and wherein the output signals output by the detectors (10, 12, 30, 32, 34, 36) for the intensity profiles of the respective sub-beams (8, 28) multiply together to provide a product signal for further processing become.
Claims
Method for evaluating the time-resolved intensity profile of a radiation associated with an object to be measured, in which the radiation in a beam splitter ( 22 . 24 . 26 ) into at least two partial beams ( 8th . 28 ), where for each sub-beam ( 8th . 28 ) whose time-resolved intensity profile in a detector assigned to it ( 10 . 12 . 30 . 32 . 34 . 36 ), and where the signals from the detectors ( 10 . 12 . 30 . 32 . 34 . 36 ) for the intensity profiles of the respective partial beams ( 8th . 28 ) output signals for providing a product signal for further processing are multiplied together. Method according to Claim 1, in which the radiation is a particle which is illuminated by light from a light source ( 2 . 2′ ) scattered or reflected light beam ( 6 ) is evaluated. Method according to Claim 2, in which the speed of flight of particles moving in a direction of flight ( 2 . 2′ ) is determined by the radiation from that with the light from a plurality of in the direction of flight of the particles ( 2 . 2′ ) spaced apart light sources illuminated particles ( 2 . 2′ ) scattered or reflected light rays ( 6 ) and the time difference of the corresponding intensity peaks of the respective product signals is determined. Measuring device ( 1 . 1 . 1 ) for determining characteristic properties of particles ( 2 . 2′ ) or particles, with a number of evaluation systems ( 60 . 62 ) for the particle ( 2 . 2′ ) or particles associated radiation, wherein the or each evaluation system ( 60 . 62 ) at least two each a sub-beam ( 28 ) of the radiation to be evaluated associated detectors ( 30 . 32 . 34 . 36 ), the signal output side with a multiplier unit for the of the detectors ( 30 . 32 . 34 . 36 ) for the intensity profiles of the respective partial beams ( 28 ) output signals is connected. Measuring device ( 1 . 1 . 1 ) according to claim 4, wherein the or each evaluation system ( 60 . 62 ) each have a beam splitter ( 24 . 26 ) for splitting the particles ( 2 . 2′ ) or particles associated radiation in a number of sub-beams ( 28 ).