A survey of the class 3R accessible emission limits relative to bioeffects data

Abstract

Laser safety control measures are often based upon the laser hazard class for the system. The Class 3R accessible emission limit is commonly used as a threshold hazard class for the assignment of laser eye protection, medical surveillance, and other administrative and engineering control measures. In this paper, we review the ANSI Z136.1-2014 exposure limits and class 3R accessible emission limits, and compare historical bioeffects data in order to examine risks for exposure at the 3R level. Focus areas of most concern are the consideration of exposure to extended-source and multi-pulse exposure limits. This information is of use to laser safety programs when making decisions regarding a specific laser system’s control measures assignment and is assembled to inform future revisions to national and international safety standards.Laser safety control measures are often based upon the laser hazard class for the system. The Class 3R accessible emission limit is commonly used as a threshold hazard class for the assignment of laser eye protection, medical surveillance, and other administrative and engineering control measures. In this paper, we review the ANSI Z136.1-2014 exposure limits and class 3R accessible emission limits, and compare historical bioeffects data in order to examine risks for exposure at the 3R level. Focus areas of most concern are the consideration of exposure to extended-source and multi-pulse exposure limits. This information is of use to laser safety programs when making decisions regarding a specific laser system’s control measures assignment and is assembled to inform future revisions to national and international safety standards.