Liu K, Garmire E
Appl Opt. 1995 Jul 20;34(21):4409-15. doi: 10.1364/AO.34.004409.
Experiments to investigate the potential for practical laser graffiti-removal systems are reported. A universal engineering curve for the time needed for removal of paint from nonconductive substrates that was valid over a range of 10(7) in intensity was measured with a variety of lasers. Comparable times were measured for conductive substrates, when pulses shorter than the thermal conduction times were used. Analysis suggests that Q-switched Nd:YAG lasers may be the most efficient means for removing graffiti and other unwanted paint. An 1-m(2) area of paint 14 µm thick can be removed in approximately 10 min with a 50-Hz laser system of 15-W average power.
报道了用于研究实用激光涂鸦清除系统潜力的实验。使用多种激光器测量了从非导电基底上去除油漆所需时间的通用工程曲线，该曲线在强度范围为10⁷内有效。当使用短于热传导时间的脉冲时，对导电基底测量了类似的时间。分析表明，调Q Nd:YAG激光器可能是去除涂鸦和其他不需要的油漆的最有效手段。使用平均功率为15W、频率为50Hz的激光系统，大约10分钟内可以去除面积为1平方米、厚度为14μm的油漆。
