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Limiting angular subtense
| Glossary Of Laser Terminology |
The apparent visual angle which divides intrabeam viewing from extended-source viewing.
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Nominal ocular hazard distance (nohd), английский
The axial beam distance from the laser where the exposure or irradiance falls below the applicable exposure limit.
Apparent visual angle, английский
The angular subtense of the source as calculated from the source size and distance from the eye. it is not the beam divergence of the source.
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