求激光打标机的激光防护眼睛及标准
公司有几台激光打标机，能量为5W,请问应该选用什么样的激光防护眼镜，有没有相关的一些针对这类激光机防护要求的标准？？ 我这里有一些资料不知是否对你有帮助，你可以看一看！主要是对激光的防护标准介绍。 A 有关激光安全等级分类及相关要求（依据国家激光操作安全等级分类标准规范）：Class I：低输出激光（功率小于0.4mW），不论何种条件下对眼睛和皮肤，都不会超过MPE值，甚至通过光学系统聚焦后也不会超过MPE值。可以保证设计上的安全，不必特别管理。典型应用如激光教鞭，CD播放机，CD-ROM设备，地质勘探设备和实验室分析仪器等。
Class II：低输出的可视激光（功率0.4mW-1mW），人闭合眼睛的反应时间为0.25秒，用这段时间算出的曝光量不可以超过ＭＰＥ值。通常1ｍＷ以下的激光，会导致晕眩无法思考，用闭合眼睛来保护，不能说完全安全，不要直接在光束内观察，也不要用Class II激光直接照射别人的眼睛，避免用远望设备观察Class II激光。典型应用如课堂演示，激光教鞭，瞄准设备和测距仪等。
Class III ：中输出激光，光束若直接射入眼睛，会产生伤害，基于某些安全的理由，进一步分为IIIＡ和IIIＢ级。
IIIＡ级为可见光的连续激光，输出为1-5ｍＷ的激光束，光束的能量密度不要超过25Ｗ／ｍ－ｍ，避免用远望设备观察IIIＡ激光，这样可能增大危险。III Ａ的典型应用和Class II级有很多相同之处，如激光教鞭，激光扫描仪等。
III B 级为5-500mＷ的连续激光，直接在光束内观察有危险。但最小照射距离为13ｃｍ，最大照射时间十秒以下为安全。IIIB激光的典型应用如光谱测定和娱乐灯光表演等。
ClassIV：高输出连续激光（大于500mW），高过第三级，有火灾的危险，扩散反射也有危险。典型应用如外科手术，研究，切割，焊接和显微机械加工等
B 激光作业基本安全要求（参考美国职业卫生法规要求）
1926.54(a)
Only qualified and trained employees shall be assigned to install, adjust, and operate laser equipment.（操作员必须通过培训及考核合格）
1926.54(c)
Employees, when working in areas in which a potential exposure to direct or reflected laser light greater than 0.005 watts (5 milliwatts) exists, shall be provided with antilaser eye protection devices as specified in Subpart E of this part. （接触超过0.005瓦以上激光，必须佩戴激光防护眼罩）
1926.54(d)
Areas in which lasers are used shall be posted with standard laser warning placards. （激光安全标志）
1926.54(e)
Beam shutters or caps shall be utilized, or the laser turned off, when laser transmission is not actually required. When the laser is left unattended for a substantial period of time, such as during lunch hour, overnight, or at change of shifts, the laser shall be turned off.
1926.54(f)
Only mechanical or electronic means shall be used as a detector for guiding the internal alignment of the laser.
1926.54(h)
When it is raining or snowing, or when there is dust or fog in the air, the operation of laser systems shall be prohibited where practicable; in any event, employees shall be kept out of range of the area of source and target during such weather conditions. （激光应避免在雨、雪、雾、尘等不良环境下操作）
1926.54(i)
Laser equipment shall bear a label to indicate maximum output.
1926.54(j)
Employees shall not be exposed to light intensities above:
1926.54(j)(1)
Direct staring: 1 micro-watt per square centimeter;
1926.54(j)(2)
Incidental observing: 1 milliwatt per square centimeter;
1926.54(j)(3)
Diffused reflected light: 2 1/2 watts per square centimeter.
1926.54(k)
Laser unit in operation should be set up above the heads of the employees, when possible.
1926.54(l)
Employees shall not be exposed to microwave power densities in excess of 10 milliwatts per square centimeter.
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