Light barrier structure for uncovering large dihedral angles includes a source of light and one or more detector elements fitted at a distance from the source of light.

摘要

A reflector element (12) fits in a beam path between a source of light (10) and a detector element (14). In order to use a single source of light and a single reflector element to uncover a large dihedral angle with a light barrier structure, the reflector element has a scattering or diffractive structure.