| 摘要 |
<p>The sensor (10) has a light transmitter (14) for emitting transmission light (16) into a monitoring area (12). A 360 degree-receiving optics (24) in the form of a rotating body comprises a peripheral convex light entry surface concentric and parallel to a main axis, so that the area forms a plane perpendicular to the main axis or a peripheral angle range. The optics comprises a conical recess at an upper end lying opposite to a convex light exit surface with respect to the main axis. The optics comprises a star aperture, which divides the monitoring area into sectors. The light transmitter comprises light sources e.g. LEDs and vertical cavity surface emitting laser. An independent claim is also included for a method for monitoring a monitoring area.</p> |
