# numerical aperture measurement

## German translation: Numerische Apertur

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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
 English term or phrase: numerical aperture measurement German translation: Numerische Apertur Entered by:

 15:41 Jan 3, 2002
English to German translations [PRO]
Tech/Engineering / optical fibres
 English term or phrase: numerical aperture measurement I know that NA is called Numerische Apertur in German - what I'm having difficulties with is the translation of the measurement method described below: NA is measured at the one percent power level of a one-dimensional far-field scan at 1310 nm. Thank you!
 Caro MaucherGermany Local time: 07:46
 Numerische Apertur Explanation:Die numerische Apertur wird auf der Ein-Prozent-Ebene eines eindimensionellen Feldscans bei 1310 Nm gemessen.
Selected response from:

Local time: 07:46
 Merci!4 KudoZ points were awarded for this answer

5Messung der numerischen Apertur
4Below
 1964

10 mins   confidence:
Below

Explanation:
far-field(radiation field,far field :fraunhofer region= (german Fernfeld) : the region where the angular field distribution is
esentially independent of distance from source

Definition a measure of the light-accepting property of an optical fibre

Reference Fiberoptic Sensor Technology Handbook,OPTECH,Herndon,VA,USA,1986
(1)
ABBREV NA

Reference DA Hill,Fiber Optics,London,1977,p.32

Note {DOM} Electronics:Optoelectronic/optic components:Optic fibres and accessories
{GRM} n.p.
{NTE} the sine of the vertex angle of the largest cone of meridional rays that can enter or leave an optical system or element,multiplied by the refractive index of the medium in which the vertex of the cone is located.Generally measured with respect to an object or image point and will vary as that point is moved
(2)
TERM numerical aperture

Reference Fiberoptic Sensor Technology Handbook,OPTECH,Herndon,VA,USA,1986;Tech Term;DA Hill,Fiber Optics,London,1977,p.32

Note {DOM} Electronics:Optoelectronic/optic components:Optic fibres and accessories
{GRM} n.p.
{NTE} the sine of the vertex angle of the largest cone of meridional rays that can enter or leave an optical system or element,multiplied by the refractive index of the medium in which the vertex of the cone is located.Generally measured with respect to an object or image point and will vary as that point is moved

Definition Vermögen des Lichtleiters,Licht abzustrahlen

Reference Siemens,Begriffe der Lichtwellenleiter-Übertragungstechnik,S1
(1)
TERM numerische Apertur

Reference Siemens,Begriffe der Lichtwellenleiter-Übertragungstechnik,S1

Note {DOM} Elektronik:optoelektronische/optische Bauelemente:Lichtwellenleiter und Zubehör,in der Praxis bezeichnet man als numerische Apertur den Sinus eines geeigneten definierten Öffnungswinkels

 1964TurkeyLocal time: 09:46Native speaker of: TurkishPRO pts in pair: 4

12 mins   confidence:
Numerische Apertur

Explanation:
Die numerische Apertur wird auf der Ein-Prozent-Ebene eines eindimensionellen Feldscans bei 1310 Nm gemessen.

 Adalbert KowalLocal time: 07:46Native speaker of: GermanPRO pts in pair: 46
 Merci!

20 mins   confidence:
Messung der numerischen Apertur

Explanation:
Die numerische Apertur ist das Produkt aus dem Brechungsindex und der Apertur (Ref.: A. Kucera, The Compact Dictionary of Exact Science and Technology). Je größer die NA ist, desto mehr Listleistung kann in einen Lichtwellenleiter eingekoppelt werden.

MfG

Dipl.-Ing. Rainer Pawellek

 Rainer PawellekLocal time: 07:46Native speaker of: GermanPRO pts in pair: 127

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