激光测距-外文翻译————————————————————————————————作者:————————————————————————————————日期: LaserrangefinderAlongrangelaserrangefinderiscapableofmeasuringdistanceupto20km;,thistechniqueisnotappropriateforhighprecisionsub-millimetermeasurements,,,itwilleventuallyspreadoverlongdistancesduetothedivergenceofthelaserbeam,aswellasduetoscintillationandbeamwandereffects,causedbythepresenceofairbubblesintheairactingaslensesranginginsizefrommicroscopictoroughlyhalftheheightofthelaserbeam',say,beneathsometreesorbehindbushes,,,overdistanceslongerthan1200ft(365m),thetarget,ifinproximitytotheearth,maysimplyvanishintoamirage,=ct/2wherecisthespeedoflightintheatmosphereandtistheamountoftimefortheround-
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