Optoelectronic sensor including a light transmitter with multiple wavelength light transmission comprising a monolithic semiconductor component

US10197439B2 · kind B2 · utility

Assignee

• SICK AG · DE

Inventors

• Ingolf Hörsch · Emmendingen, DE
• Gerhard Merettig · Waldkirch, DE
• Roland Bergbach · Malterdingen, DE
• Felix Lang · Schliengen, DE
• Gunter Leuker · Waldkirch, DE

Key dates

• Filing date: Jul 13, 2016
• Grant date: Feb 5, 2019
• Expiry date: Feb 6, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J2001/083
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An optoelectronic sensor for recognizing objects or object properties comprises a light transmitter for transmitting transmitted light into a detection zone, a light receiver for receiving received light and an evaluation unit which is configured to detect an object located in or projecting into a detection zone and/or to determine a property of such an object with reference to the received light received by the light receiver. The light transmitter comprises a monolithic semi-conductor component having a first light emitting layer and a second light emitting layer, with the first light emitting layer being configured for emitting red light and the second light emitting layer being configured for emitting infrared light, and with the second light emitting layer defining a central light emitting surface and the first light emitting layer defining an outer light emitting surface surrounding the central light emitting surface.