Integrated laser alignment aid using multiple laser spots out of one single laser

摘要

The present invention relates to light curtains, in particular safety light curtains, for monitoring a protective field. Furthermore, the present invention relates to optical units which are part of such a light curtain. An optical unit for an alignment system of a light curtain monitoring a protective field comprises an optical processing element for generating a defined radiation pattern from the radiation emitted by an alignment radiation source, and at least one optical wave guide for guiding radiation from at least one display radiation source to a surface of the optical element which is visible to an observer.

主权项

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.