OPTICAL EXAMINATIONS WITH CONTROLLED INPUT LIGHT

摘要

The invention relates to a sensor device (100) in which the spatial distribution of an input light (L1) emission from a light emitting area (121, 122) of a light source (120) can selectively be changed. The input light is propagated through an optical system (110) to produce some output light (L2). Changes of the input light are taken into account when the detected output light (L2) is evaluated. Thus it is for example possible to detect and/or eliminate optical disturbances occurring in the optical path outside an object region (3). The light source (120) may particularly comprise a plurality of a light emitting segments (121, 122) that can selectively be switched on or off.