en

numerical aperture

1

Terminological databases

EKI terminibaas Esterm

ID 711047 Last modified 20.11.2024
View dataset
View dataset
Domain optical instruments
apertuurarv preferred
numerical aperture
NA
  • apertuuri (valgust läbilaskva ava) number
  • product of the refractive index of the object space and the sine of the semi-aperture of the cone of rays entering the entrance pupil of the objective lens from the object point. The resolving power is proportional to the numerical aperture.
apertuurarv preferred
Usage examples
  • Ava saab valida poole ühiku kaupa. Mida suurem on avaarv, seda väiksem on ava. Valitav avade vahemik sõltub kasutatavast objektiivist. Võimalikud: 1,0-64. Väiksema avaarvuga pildistades saad head portreevõtted, kus taust jääb uduseks. Suur avaarv annab aga teravussügavuse- kõik fotol on terav.
avaarv
numerical aperture
Usage examples
  • A binocular microscope shall be used for counting and shall have the following features: - Koehler illumination, ... - a 40 times bar-focal positive phase-contrast achromatic objective with a numerical aperture of 0,65 to 0,70 and phase ring absorption within the range 65 to 85 %, ...
NA abbreviation

Metroloogia terminibaas

ID 1142941 Last modified 31.05.2026
View dataset
View dataset
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

Rakubioloogia terminibaas

ID 461121 Last modified 20.10.2023
View dataset
View dataset
  • tegur, mis kirjeldab maksimaalset nurka, mille all valgus väljub kondensorist või võimeline siseneda objektiivi
  • Value characterizing maximum angle under that light can pass out of condenser or enter objective.
  • значение характеризующее максимальный угол выхода и входа света соответственно для конденсора и объектива.
numerical aperture

Word forms not available

Etymology not available

Related words not available

Search the same word

in the EU's IATE term base

Web examples

Online Language Learning Tool SkELL allows users to search for phrases in sentences, collocates and similar words. These examples have been automatically selected and may contain errors.
Skell logo