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Proceedings Paper

Near-infrared laser range finder using kHz repetition rate
Author(s): Josef Kölbl; Michael Fröschl; Adam Seedsman; Peter Sperber
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Paper Abstract

The paper deals with laser range finding (LRF) technology for tracking fast-moving objects with kHz laser repetition rates. The LRF is based on time-of-flight measurement, where a short emitting laser pulse is transmitted and its time-of-flight is accurately measured by the electronics with respect to the received impulse from a non-cooperative target. The emitted laser energy is in the near infrared wavelength region. The detector is based on a single-photon detection principle of a silicon Avalanche photodiode, operated in so-called Geiger mode. A solution was devised to utilise single photon detection even at strong daylight conditions. The LRF has been integrated in a robust and compact technology demonstrator, and has successfully ranged to rapidly-moving and accelerating small targets. A detailed mathematical model was developed to predict the ranging performance of the LRF for evolution of application-specific designs. The current technology allows ranging up to a maximum range of 1.5 km with ± 0.5 m accuracy against large stationary targets, as well as tracking of small targets of 75 mm diameter moving up to a range of 300 m with a speed resolution of ± 5 m/s. The LRF device uses a standard serial protocol for device communication and control, and operates at a temperature range from 0 °C - 55 °C.

Paper Details

Date Published: 2 October 2008
PDF: 9 pages
Proc. SPIE 7115, Technologies for Optical Countermeasures V, 71150M (2 October 2008); doi: 10.1117/12.800132
Show Author Affiliations
Josef Kölbl, EOS Optronics GmbH (Germany)
Michael Fröschl, EOS Optronics GmbH (Germany)
Adam Seedsman, EOS Optronics GmbH (Germany)
Peter Sperber, Univ. of Applied Sciences (Germany)

Published in SPIE Proceedings Vol. 7115:
Technologies for Optical Countermeasures V
David H. Titterton; Mark A. Richardson, Editor(s)

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