Optical rotary joint with high return loss

US7936954B2 · kind B2 · utility

Assignee

• SCHLEIFRING UND APPARATEBAU GMBH · DE

Inventors

• Gregor Popp · Munich, DE
• Josef Braeu · Munich, DE
• Matthias Rank · Fürstenau, DE

Key dates

• Filing date: Jun 22, 2009
• Grant date: May 3, 2011
• Expiry date: Jul 3, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B5/04
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical rotary joint comprises a first collimator arrangement for coupling-on first light-waveguides and a second collimator arrangement for coupling-on second light-waveguides, with the second collimator arrangement being supported to be rotatable relative to the first collimator arrangement about a rotation axis. A Dove prism is provided between the collimator arrangements as a derotating element. An intermediate layer is provided on at least one boundary face of an optical constituent part to a surrounding medium, which the intermediate layer comprises a nano-structure having a mean refractive index lying between a refractive index of a material of the optical constituent part and a refractive index of the medium of the surroundings.