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Harald Wölfelschneider, Andreas Blug, Claudia Baulig, Heinrich Höfler

Fast Distance Measurement for Laser Scanning

This contribution describes the principle of distance measurement by means of a modulated laser beam and phase detection. The most critical impacts on accuracy and reliability like noise, modal structure of the laser, and crosstalk are qualified and quantified. Counteractive measures to reduce their influence are shown. The realized distance measuring module enables to measure distances in a some ten meter range with frequencies up to 1 MHz. Some results of a laser scanner for clearance measurement of railway lines are shown.

tm – Technisches Messen, Oldenbourg Wissenschaftsverlag

Print ISSN: 0171-8096
Volume: 72, 07/2005
Pages: 455 - 467

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