Lidar measuring system and lidar measuring method

US9702975B2 · kind B2 · utility

Assignee

• Technische Universitaet Hamburg-Harburg · DE

Inventors

• Ernst Brinkmeyer · Kürten, DE
• Thomas Waterholter · Rellingen, DE

Key dates

• Filing date: Nov 11, 2013
• Grant date: Jul 11, 2017
• Expiry date: Jan 22, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A90/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present invention relates to a lidar measurement system for the detection of the presence and/or motion of particles and/or objects in a space region remote from the lidar measurement system and comprising an interferometer arrangement, as well as to a corresponding method using such a measurement system. The interferometer arrangement comprises a continuous wave laser source (2), a photodetector arrangement (7), and optical components which are adapted to split light (23) emitted by the continuous wave laser source (2), to guide it along a first optical path constituting a measurement branch (4) and along a second optical path, which is separate from the first optical path and constitutes a reference branch (5), and to eventually have it incident in a spatially coherently superimposed manner onto the photodetector arrangement (7). The reference branch (5) has a predetermined optical path length, and the measurement branch (4) comprises a measurement portion (16), in which the light is directed away from the measurement system towards a space region remote from the measurement system and passes through the space region and light backscattered towards the measurement system by p…