Light source

US8944657B2 · kind B2 · utility

Assignees

• OSRAM Opto Semiconductors GmbH · DE
• OSRAM Gesellschaft mit beschraenkter Haftung · DE

Inventors

• Alessandro Scordino · Dolo, IT
• Julius Muschawek · Gauting, DE
• Jan Marfeld · Regensburg, DE

Key dates

• Filing date: May 28, 2008
• Grant date: Feb 3, 2015
• Expiry date: Oct 24, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/856
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A light source comprises a light-emitting device to emit electromagnetic radiation from an emitting surface and an optical element having a light input surface, a light output surface and side surfaces connecting the light input surface to the light output surface. The light input surface is located in the optical path of the light-emitting device, the electromagnetic radiation entering the optical element through the light input surface, and the light input surface has a concave curvature and an area being smaller than the area of the light output surface.