7. Glossary
Angle visuel; viewing angle
Angle between the straight lines connecting the ends of the apparent source and the eye of the observer or measurement point (synonyms: apparent diameter, angular extent).
Angle d'acceptance; acceptance angle
Angle of the detector limited by the field-of-view diaphragm over which illuminance and luminance measurements are averaged. There is a thermal acceptance angle γ th and a photochemical acceptance angle γ ph (synonyms: field of view, effective field, angular aperture).
Retinal thermal burn; Brûlure rétinienne thermique
Thermal retinal damage induced by radiation between 380 and 1,400 nm (visible and IR-A). 2 TLVs are associated with retinal...
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