et

ψ

1 symbol

Terminological databases

Metroloogia terminibaas

ID 574397 Last modified 06.10.2026
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Domain metrologymeasuring procedures
  • nurk valgusti esimese fotomeetrilise telje ja valgusti jalgpunkti (nadiiri) läbiva sirge vahel tasandis (fotomeetriline asimuut C = 00, C = 900), kui mõõtekalle on null
  • angle the first photometric axis of a luminaire makes with the nadir of the luminaire in the plane C = 00, C = 900 when the tilt during measurement is zero
pöördenurk
Usage examples
  • Valgusti pöördenurgad esitatakse paremakäelises x, y, z-koordinaadistikus.
ψ symbol
rotation
Usage examples
  • The rotation angles of the luminaire are specified in a right-handed x, y, z coordinate system.
ψ symbol

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