Detection of particles having diameters in the reactive sub-micron - region with the use of a field with a high density

摘要

it is the detection of particles with diameters in the submikron area using a detektorfeldes with high density is described.this detektorfeld, for example, a ladungsgekoppelte device is used in a sample area to detect light by the particles is producedby a light source such as a laser source, are highlighted.a ladungsspeicherung is used for each of detektorfeld high density dataset assigned to buffersand the multiple serial output signals are processed by a parallelverarbeitungstechnik the schwellendetektion and an a / d conversion includes.a microcomputer with a digitalspeicher receives the digital output signals and generates output signals, the size of the particles in the submikron - display area.a further improvement in terms of sizes smaller than the one stru00f6mungsmittel particles is supported through the use of a strahlformoptik achievedthe sample area by the pressing beleuchtungsstrahl that shapes that either a astigmatischen (highly elliptical) cross section.with the stru00f6mungsmittel towards the imaging system perpendicular to the object level is held, and a circular cross-section)although the flow parallel to the object level is held. in any case, it is the focal point of the jet is essentially arranged centrally in the sample area.