et

avaarv

1 substantive

Terminological databases

Metroloogia terminibaas

ID 1142941 Last modified 31.05.2026
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Domain metrologymeasuring instruments
avaarv preferred
apertuurarv
AN
numerical aperture
AN
  • poolnurkava nurga siinus korrutatuna ümbritseva keskkonna murdumisteguriga n
  • sine of the half aperture angle multiplied by the refractive index n of the surrounding medium
avaarv preferred
Usage examples
  • Tavaliselt määratakse avaarv lainepikkuse jaoks, mis asub mõõtmisel saadud optilise mõõteribalaiuse keskel.
apertuurarv
AN symbol
numerical aperture
Usage examples
  • Typically the numerical aperture is specified for the wavelength that is in the middle of the measurement optical bandwidth.
AN symbol

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