Objective.规定确定BLH加权辐射,LB,用于评估角度为α≥11mrad的聚光灯。BLH加权辐照度,EB,可以替代地用于较小的来源。在受委托进行风险评估(RA)的人员中,适当的工具并不常见,尤其是LB测量可能具有挑战性。因此,提出了一种实用的基于照度的BLHRA方法,Ev,预先计算的黑体BLH发光辐射效率,KB,vPlanck,和立体角的考虑。方法。检验了该方法的实用性,并与其他RA方法进行了比较。结果。为了确保应用工具的可比性,测量接近辐射标准,显示灯扩展不确定度范围内的偏差(<4%),而较长距离的偏差为±15%。专注于复杂的LED聚光灯,通过RA方法,所有检测到的值都可以在±20%的范围内转换为LB。使用多个聚光灯进行的两次现场测试产生了从不同的RA方法获得的最大允许曝光持续时间,这些方法在很大程度上低于±30%的不确定性范围内达成一致。结论。对于白光源的工作场所BLHRA,可以得出所提出的Ev方法的一般实用性。
Objectives. It is prescribed to determine blue-light hazard (BLH) weighted radiances, LB, for an assessment of spotlights with an angular subtense α≥11mrad. The BLH weighted irradiance, EB, can be used alternatively for smaller sources. Appropriate instruments are not common among persons commissioned with risk assessment (RA), and especially LB measurements may be challenging. Therefore, a practical BLH RA approach is proposed that is based on illuminance, Ev, pre-calculated blackbody BLH efficacies of luminous radiation, KB,vPlanck, and solid angle considerations. Methods. The practicality of this method was examined and compared against other RA approaches. Results. To ensure comparability of the applied instruments, measurements were performed close to a radiance standard, showing deviations within the lamp\'s expanded uncertainties (<4%), whereas the deviations were ±15% for longer distances. Focusing on a complex light-emitting diode (LED)
spotlight, all detected values could be converted to LB by means of the RA methods within ±20%. Two field tests with several spotlights yielded maximum permissible exposure durations (MPED) obtained from the different RA approaches that agreed among each other within uncertainties largely below ±30%. Conclusion. The general practicality of the proposed Ev method can be concluded for a workplace BLH RA of white-light sources.