en

vertical photometric angle

1

Terminological databases

Metroloogia terminibaas

ID 574384 Last modified 06.10.2026
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Domain Standardisation - Metrology
fotomeetriline vertikaalnurk
γ
vertical photometric angle
γ
  • valgusti fotomeetrilist keset läbivate valguskiire ja valgusti allasuunduva vertikaaltelje vaheline nurk
  • angle between the light path and the downward vertical axis both passing through the luminaire photometric centre
fotomeetriline vertikaalnurk
Usage examples
  • Fotomeetriline vertikaalnurk väärtusega 00 langeb kokku jalgpunkti (nadiiri) suunas lähtuva püstsirgega.
Good to know
  • Fotomeetrilise vertikaalnurga ühik on nurgakraad (0).
γ symbol
vertical photometric angle
Usage examples
  • A photometric vertical angle of 0° coincides with the vertical line pointing towards the nadir.
Good to know
  • Unit ° (degree), and the direction γ = 0 is therefore oriented to the nadir.
γ symbol

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