Core Viewpoint - The use of Class3R lasers in concerts can create impressive visual effects, but safety measures must be in place to mitigate potential risks associated with laser exposure [1][5]. Group 1: Laser Classification and Safety - Class3R lasers are commonly used in concerts and are categorized as medium to high power lasers, capable of producing bright and clear beams in dark environments [2][3]. - The International Electrotechnical Commission (IEC) classifies lasers into four categories (Class1 to Class4) based on their output power and potential hazards, with Class3R being a specific subset that poses certain risks [2][3]. - Safety risks associated with Class3R lasers include potential retinal damage from direct eye exposure, which can occur even with brief contact [3][5]. Group 2: Risk Mitigation Measures - To control risks, dynamic energy regulation systems are employed during concerts to monitor and adjust laser output in real-time, ensuring that exposure levels remain within safe limits [4]. - Specific safety measures include maintaining a minimum distance of 3 meters between the laser beam and the audience, and projecting lasers at angles greater than 30 degrees to avoid direct exposure [4][6]. - It is recommended that audience members avoid direct eye contact with laser beams and take precautions, such as closing their eyes or turning away during laser displays [6].

近些年，不少演唱会倾向于使用激光打造出众的舞美效果。那么，大型演出使用的高密度激光是否安 全？人们应该如何避免被激光伤害？科技日报记者日前就此采访了相关专家，为您一探究竟。 科技日报记者 王姗姗 前不久，某歌手在生日演唱会上，使用高密度激光打造"激光银河"舞美特效，很好地调动了现场气氛， 但有观众将此调侃为"致死量激光"。这也引发了公众对激光危害的讨论。 演唱会通常会使用"动态能量调节系统"实时监控和调整激光输出。"在演唱会中，'动态能量调节系统'通 过传感器监测环境光强、观众位置和激光路径，自动降低或调整激光功率和方向，以防止观众过度暴 露。"韩德专举例道，当监测到激光强度超过阈值时，这套系统会动态调低激光能量。同时，该系统还 可以通过调整激光投射角度和高度，避免光束直射人群，减少眼部或皮肤受伤的可能性。 第二，要采取必要的防护措施。例如让激光设备以30度以上仰角投射激光，并确保光束路径与观众头部 保持3米以上的安全距离。 此外，如果现场工作人员长时间处于激光覆盖区域，则需佩戴符合标准的激光防护装备，防止眼部因激 光照射出现刺痛、视物模糊等不适。 避免眼睛直视光束 针对现场观众"致死量激光"的调侃，韩德专认 ...