The Ignition Of Logging Slash From Safe Distances Using A CO[sub]2[/sub] Laser

M. D. Waterworth; E. R. Rolley

doi:10.1117/12.935406

26 October 1983 The Ignition Of Logging Slash From Safe Distances Using A CO₂ Laser

M. D. Waterworth, E. R. Rolley

Proceedings Volume 0398, Industrial Applications of Laser Technology; (1983) https://doi.org/10.1117/12.935406
Event: 1983 International Technical Conference/Europe, 1983, Geneva, Switzerland

Abstract

Until recently, tree logging slash, which must be virtually completely removed by burn-ing to allow for regeneration growth, has been ingited by conventional techniques employing man-held drip torches, electrically-controlled igniters, or 'incendiary' matches dropped from helicopters. Whilst satisfactory in many respects, these methods suffer with regard to cost, accessibility and, in particular, safety. Lives have been endangered and indeed lost during several decades of regeneration burning. The instrument described in this paper permits the safe ignition of logging slash at distances varying between about 100 metres and 1.5 kilometres. It employs a CO₂laser, beam expander, and Cassegrain telescope to produce a hot spot of the appropriate size and energy density at the required distance. Focussing is achieved by adjustment of the beam-expanding optics. The instrument is fully steerable.

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M. D. Waterworth and E. R. Rolley "The Ignition Of Logging Slash From Safe Distances Using A CO₂ Laser", Proc. SPIE 0398, Industrial Applications of Laser Technology, (26 October 1983); https://doi.org/10.1117/12.935406

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