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Proceedings Paper

Atmospheric extinction and scattering effects on laser rangefinders at eyesafe wavelengths
Author(s): Daniel L. Hutt; Jean-Marc Theriault; Vincent Larochelle; Deni Bonnier
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Paper Abstract

Extinction of laser rangefinder (LRF) pulses by the atmosphere depends on the LRF wavelength, weather conditions, and the aerosol concentration along the optical path. The total atmospheric extinction (alpha) ((lambda) ) is the sum of the molecular and aerosol contributions, (alpha) m((lambda) ) and (alpha) a((lambda) ). We present simple expressions for (alpha) m((lambda) ) and (alpha) a((lambda) ) for the LRF sources: Er:glass, Ho:YAG, and CO2 which operate near 1.54, 2.1, and 10.6 micrometers respectively. Also included are results for Nd:YAG which may be made to lase at the eyesafe wavelength of 1.444 micrometers . The expressions give an estimate of (alpha) ((lambda) ) as a function of standard meteorological parameters, assuming horizontal beam propagation. The effect of forward scattering on the received LRF signal is also discussed.

Paper Details

Date Published: 15 September 1993
PDF: 13 pages
Proc. SPIE 1968, Atmospheric Propagation and Remote Sensing II, (15 September 1993); doi: 10.1117/12.154887
Show Author Affiliations
Daniel L. Hutt, Defence Research Establishment Valcartier and Univ. Laval (Canada)
Jean-Marc Theriault, Defence Research Establishment Valcartier (Canada)
Vincent Larochelle, Defence Research Establishment Valcartier (Canada)
Deni Bonnier, Defence Research Establishment Valcartier (Canada)

Published in SPIE Proceedings Vol. 1968:
Atmospheric Propagation and Remote Sensing II
Anton Kohnle; Walter B. Miller, Editor(s)

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