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Simplified risk assessment of high-power optical radiation sources

Subproject I: Evaluation criteria for the risk assessment of high-power optical radiation sources,
Subproject II: Validating a simplified method for assessing complex blue light and infrared radiation exposures (PEROSH project)

Project number: F 2483 Institution: Federal Institute for Occupational Safety and Health (BAuA) Status: Ongoing Project Planned end: 2022-09-30

Description:

The rapid development in the field of semiconductors is accompanied by more and more powerful, energy-efficient, and less expensive incoherent optical radiation sources. Likewise, modern gas discharge lamps with very high radiances can also be purchased inexpensively. The related wavel-ength distributions, source sizes, as well as radiances technically realisable have changed by orders of magnitude in the last decade.

Such incoherent high power optical radiation (HiPOR) sources are used, for example, at events or in television studios where some or even many of them are operated simultaneously. In addition, illumi-nating special working areas at construction sites (structural and civil engineering) or in industry with powerful LED arrays is getting more and more popular due to their inexpensive operation. However, the necessary safety distances can often not be met so that possible hazards to workers cannot be excluded completely.

Usually, UV radiation from HiPOR sources is uncritical due to built-in filters, but the assessment of retinal hazards caused by visible and infrared radiation is highly significant. The German Occupational Safety and Health Ordinance on Artificial Optical Radiation (OStrV) lists exposure limit values and demands a risk assessment being performed competently. The diversity of possible exposure scena-rios complicates the necessary experimental radiance measurements. Additionally, up to now no con-sistent recommendations exist for the assessment of working conditions under HiPOR source expo-sure.

The in lab examination of diverse HiPOR source exposure scenarios aims at the determination of such assessment criteria that will be evaluated subsequently and unified by a concurrent PEROSH project. Finally, by means of a simple tool, the results will be transferred into practice.

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