Device for coupling and/or decoupling beams of light, with an integrated optical component

US5271078A · kind A · utility

Assignee

• DR. JOHANNES HEIDENHAIN GMBH · DE

Inventors

• Andreas Franz · Ludwigsburg, DE
• Michael Allgauer · Traunreut, DE

Key dates

• Filing date: May 20, 1992
• Grant date: Dec 14, 1993
• Expiry date: May 20, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/34
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A measurement device having a correction grating associated with a gauge and deflects two diffracted partial beams overlappingly, at a very small angle (.alpha.), onto a single coupling grating. From there, two waveguides located closely beside one another are used to introduce the beams into a coupler and the beams are superimposed and evaluated in a known manner. Thus, a position measuring device can be drastically reduced in its structural size with the aid of an integrated optical component.