To establish pattern of fluid stream, e.g. from fuel injection valve for IC motor, laser beam is aligned at right angles to stream and shifted within it for receiver to register light intensities after passing through stream

To register the pattern of a fluid stream, especially fuel from a fuel injection valve for an internal combustion motor, a point light beam is generated in the fluid stream path, within a measurement chamber. The light beam is shifted in the fluid stream, and a sensor registers the scatter light beam intensity after passing through the fluid stream. The light beam is aligned at right angles to the longitudinal axis of the fluid stream and/or the injection valve longitudinal axis. To register the pattern of a fluid stream (10), especially fuel from a fuel injection valve for an internal combustion motor, a point light beam (20) is generated by a laser (22) in the fluid stream path, within a measurement chamber (42) with a rotating holder (45) for the injection valve. The light beam is shifted in the fluid stream, and a sensor (26) registers the light beam intensity after passing through the fluid stream, and especially the scatter intensity along the light beam. The light beam is aligned at right angles to the longitudinal axis of the fluid stream and/or the injection valve longitudinal axis. Die Erfindung betrifft ein Verfahren zum Erfassen eines Strahlbildes eines Fluidstrahls. Bei diesem Verfahren wird ein Punktlichtstrahl erzeugt, welcher den Fluidstrahl durchläuft. Ferner wird der Punktlichtstrahl in dem Fluidstrahl verschoben, wobei mittels eines Sensors eine Intensität des Punktlichtstrahls beim Durchlaufen des Fluidstrahls aufgenommen wird. Die Erfindung betrifft auch eine Vorrichtung zum Erfassen eines Strahlbildes.