Triangulation light sensor

US8958056B2 · kind B2 · utility

Assignee

• SICK AG · DE

Inventors

• Friedhelm Wiethege · Waldkirch, DE
• Gerhard Merettig · Waldkirch, DE

Key dates

• Filing date: Feb 15, 2013
• Grant date: Feb 17, 2015
• Expiry date: Mar 11, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S17/48
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A triangulation light sensor includes at least one light transmitter for transmitting a light signal into a detection zone, a light receiver having a plurality of receiver elements for receiving light from the detection zone reflected diffusely and/or specularly, and a reception optics arranged between the detection zone and the light receiver in the beam path, with the position of a light spot produced on the light receiver in a triangulation direction by the reflected light resulting in dependence on the distance of the object. The reception optics includes at least one multisegmented lens element having a plurality of lens segments with mutually spaced apart optical axes in the triangulation direction and at least one freeform lens element or one diffractive-optical element having a multisegmented lens element having a plurality of lens segments with optical axes spaced apart from one another in the triangulation direction.