Patent ID: 9217630
Filing Date: 2015-12-22
Classification: F16P,G01B,G01D,G01V,G02B,G08B

Abstract:
1. An alignment system for a light curtain monitoring a protective field, the light curtain comprising: a first support element and a second support element, wherein the protective field is covered by radiation transmitted between the first and second support elements, wherein the alignment system comprises at least one alignment radiation source being arranged on the first support element and at least one alignment radiation receiver arranged on the second support element for receiving the alignment radiation and for providing an alignment signal indicating a correct positioning of the two support elements with respect to each other, the alignment system further comprising at least one optical unit having an optical processing element configured to generate a defined pattern from the alignment radiation emitted by the at least one alignment radiation source, wherein the optical processing element comprises at least one of a micro-structured Diffractive Optical Element, an optical grating structure, and a prismatic structure.