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Show Laser Glossary, Definitions & Explanations This Glossary shall provide general definitions for terms used on this website as well as give some background information on terms and topics used in show laser and entertainment industry.
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Accessible Radiation

The Accessible Radiation (AR) specifies the laser power that is emitted form a laser system directly at the unit. The Laser Class assignment refers to the accessible radiation of a laser.
The accessible radiation is different to the MPE, which specifieds the power in a certain viewing distance.

See this video for the explanation of the difference between AR and maximum permissible exposure (MPE):

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