激光在各个领域里已广泛应用,在林业上的应用主要有以下几方面:一、激光切割木材这是一种高效的无锯屑切割技术.它是将聚焦的具有极高密度的激光束,射向木材表面,使木材产生强烈的热解和质变.当木材受到高热源作用时,其分子结构发生化学反应,结晶降解而达到切割的目的.在激光切割中.由于热应力和水汽蒸发等原因,最初木材表面发生微小裂隙,木材密度明显降低,开始熔融,当木材细胞完全被破坏变成碳化层时,木材即切割完毕.激光照射木材所引起的热解和质变现象不同于一般的木材碳化现象.目前应用激光切割木材的切割方式有瞬时气化法和灼烧法,它具有切缝窄,无燥音,能切割复杂工件等特点.二、采用激光技术调查森林 Laser has been widely used in various fields, the main applications in forestry are the following: First, the laser cutting wood This is an efficient technology without sawing cutting it is to focus on a very high density laser beam, Fired wood surface, so that the wood has a strong pyrolysis and qualitative change.When the wood by a high heat source role, the molecular structure of the chemical reaction, crystallization and degradation to achieve the purpose of cutting in the laser cutting due to thermal stress and water vapor evaporation The reason is that the initial cracks in the wood surface, the wood density was significantly reduced, began to melt, when the wood cells completely destroyed into carbide layer, the wood is cut is completed. Laser irradiation of wood pyrolysis and qualitative changes caused by the wood is different from the general Carbonization phenomenon.Currently the application of laser cutting wood cutting methods are instantaneous gasification method and burning method, it has a narrow slit, no noise, can cut complex workpieces, etc. Second, the use of laser technology to investigate the forest