Beam combiner for use in a head-mounted display device and beam splitter

US8456744B2 · kind B2 · utility

Assignee

• Carl Zeiss AG · DE

Inventors

• Hans-Juergen Dobschal · Kleinromstedt, DE
• Guenter Rudolph · Jena, DE
• Karsten Lindig · Erfurt, DE

Key dates

• Filing date: Feb 25, 2010
• Grant date: Jun 4, 2013
• Expiry date: Feb 25, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2027/0178
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A beam combiner for combining a first beam cluster with a second beam cluster that is not parallel to the first, to form a common beam cluster. The beam combiner includes a transparent body for the first beam cluster, which has a superimposition region that is encountered by the first beam cluster as it passes through the body. The superimposition region is split into a first section and a second section. Only the first section formed from interspaced reflective and/or refractive deflection elements causes a deflection of the second beam cluster by reflection and/or refraction, such that the first beam cluster forms the common beam cluster with the deflected second beam cluster once it has left the body.