Device for limiting measuring volume in optical measuring system, has electronic evaluation unit or electronic data processing unit connected with surface segments evaluating electrical signals supplied by focus and edge segment

摘要

The device has an optical imaging system (7) with an object level in the measuring volume (5) and an image plane. An opto-electronic surface sensor (11) with surface segments has a focus segment (12) and an edge segment (13), arranged in the image plane. An electrically connected electronic evaluation unit (14) or electronic data processing unit with the surface segments evaluates the electrical signals supplied by a focus segment and an edge segment to state the origination of the signals from a source of light (6) arranged in the measuring volume.