Patent · US Active

Polygon scanner and method of detecting objects in a monitored zone

US11353560B2 · kind B2 · utility

1Cited by

12References

16Claims

0Family size

Assignee

SICK AG · DE

Inventors

Sascha Steinkogler · Waldkirch, DE
Florian Schneider · Obernzenn, DE
Helmut Weber · Webster, US
Stefan Seitz · Windach, DE
Martin Högy · Waldkirch, DE

Key dates

Filing date	Nov 20, 2018
Grant date	Jun 7, 2022
Priority date	—
Expiry date	Apr 8, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG01S17/42
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A polygon scanner (10) for detecting objects (24) in a monitored zone (22) is provided having a light transmitter (12); having a light receiver (30); having an evaluation unit (32); and having a rotatable mirror unit (20) for a periodic deflection of the light beam (16) that has a plurality of mirror facets (34) in order thus to scan an angular section multiple times per rotation of the mirror unit (20) by a respective mirror facet (34), wherein at least some of the mirror facets (34) have a different curvature from one another. In this respect, at least one of the mirror facets (34) is configured as a free-form surface whose curvature is adapted to the angle of incidence of the transmitted light beam (16) on the mirror facet (34) that varies during the rotation of the mirror unit (20).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.