Reflector having a trapezoid reflection and method for precision photo-scanning for recognition of an object

A light barrier comprising:

• (a) a reflector comprising a reflector body having a light entry side and a back side facing away from said light entry side, said back side having a reflective structure, and a lenticular structure disposed on the reflector body and covering the light entry side, said lenticular structure having a plurality of lenses that extend in a preferential direction;
• (b) a light transmitter for transmitting light in a light transmission direction onto the reflector;
• (c) a light receiver directed at the reflector in a light reception direction;
• and
• (d) an evaluation unit for evaluating light signals received by the light receiver;
• wherein a plane that extends through the light transmitter and the light receiver stands perpendicular to the preferential direction.

A method for detecting objects in a light barrier, comprising the steps of:

• (a) transmitting a light beam onto a reflector via a light transmitter;
• (b) reflecting the light beam in the reflector and widening the light beam into a light field having a trapezoid shape;
• (c) receiving the light beam reflected in the reflector by a light receiver disposed in the light field;
• and
• (d) evaluating the light beam received by the light receiver via an evaluation unit.