Distance measuring device and method for measuring distances

US10234265B2 · kind B2 · utility

Assignee

• PRECITEC OPTRONIK GMBH · DE

Inventors

• Martin Schönleber · Aschaffenburg, DE
• Stephan Andre · Le Mousseau, FR

Key dates

• Filing date: Feb 15, 2017
• Grant date: Mar 19, 2019
• Expiry date: May 31, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B9/02091
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device for measuring a distance to an object comprises a beam splitter for splitting broadband coherent light emitted by a light source in measuring light which is guided through an object arm to the object to be measured and in reference light which is guided to a reference arm. The object arm includes a focusing optics with a focus movable along an optical axis of the object arm. The focusing optics comprises a movable optical element and is configured such that a movement of the movable optical element along the optical axis causes a higher movement of the focus of the focusing optics along the optical axis. The movable optical element of the focusing optics is coupled to the reference arm such that the optical path length of the reference arm can be tracked synchronously with and dependent on the movement of the focus of the focusing optics.