Optoelectronic protective device for detecting an object in a monitoring region comprises a passive contrast pattern arranged in a monitoring region and structured so that it is destroyed when removed from the monitoring region

摘要

Optoelectronic protective device comprises a passive contrast pattern (12) arranged in a monitoring region (3c, 3d) and structured so that it is destroyed when removed from the monitoring region up to a change in properties stored as information. Preferred Features: The contrast pattern has reflecting regions (13) and is formed on a support, preferably a foil. The support is thin and has a low wear resistance. The support has perforations or slits. The device also has a matrix-like image sensor or camera (4).