IEVref:845-30-035ID:
Language:enStatus: Standard
Term: cut-off angle, <of a luminaire>
Synonym1:
Synonym2:
Synonym3:
Symbol:
Definition: angle, measured up from nadir, between the vertical axis and the first line of sight at which the light source(s) and the surfaces of high luminance are not visible

Note 1 to entry: The cut-off angle is expressed in radian (rad) or degree (°).

Note 2 to entry: This entry was numbered 845-10-30 in IEC 60050-845:1987.


Publication date:2020-12
Source
Replaces:
Internal notes:
CO remarks:
TC/SC remarks:
VT remarks:
Domain1:
Domain2:
Domain3:
Domain4:
Domain5: