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Corneal injury thresholds for exposures to 1.54 μm radiation

机译:暴露于1.54μm辐射的角膜损伤阈值

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摘要

Corneal epithelial injury thresholds have been determined for exposures to 1.54 m infrared radiation having durations from 1 to 100 sec and beam diameters from 0.5 to 7 mm. For 1 sec exposures, measured thresholds range from 12 W/cm~2 (5 mm diameter beam) to 67 W/cm~2 (0.5 mm diameter). For 2 sec exposures, they range from 9 W/cm~2 (7 mm diameter) to 57 W/cm~2 (0.5 mm diameter). For 10 sec exposures, they range from 3.7 W/cm~2 (7 mm diameter) to 33 W/cm~2 (0.5 mm diameter). For 100 sec exposures, they are 1.4 W/cm~2 (7 mm diameter) and 3.7 W/cm~2 (2 mm diameter). The dependence of the measured thresholds on laser beam diameter provides strong evidence supporting a critical temperature damage model. These measured thresholds are greater than 10 times the maximum permissible exposure (MPE) in ANSI Z-136.5-2000.
机译:已经确定了暴露于1.54 m红外辐射的角膜上皮损伤阈值,持续时间为1到100秒,光束直径为0.5到7 mm。对于1秒的曝光,测得的阈值范围为12 W / cm〜2(直径为5毫米的光束)到67 W / cm〜2(直径为0.5毫米)。对于2秒的曝光,其范围从9 W / cm〜2(直径7毫米)到57 W / cm〜2(直径0.5毫米)。对于10秒的曝光,其范围从3.7 W / cm〜2(直径7毫米)到33 W / cm〜2(直径0.5毫米)。对于100秒的曝光,它们分别为1.4 W / cm〜2(直径7毫米)和3.7 W / cm〜2(直径2毫米)。测得的阈值对激光束直径的依赖性提供了强有力的证据来支持临界温度损伤模型。这些测得的阈值大于ANSI Z-136.5-2000中最大允许暴露(MPE)的10倍。

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