| Zugriffsnummer | 20565 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Compensation of refractive index of air |
| Autor(in); Institution |
Meiners-Hagen, Karl; 5.4, Längenmaße und -messmittel, PTB-Braunschweig
Abou-Zeid, Ahmed; 5.4, Längenmaße und -messmittel, PTB-Braunschweig
|
| Quelle/Jahr | Proceedings of the 7th international conference, European Society for Precision Engineering and Nanotechnology : May 20th - May 24th 2007, Bremen, Germany: 2 (2007), 97 - 100 |
| Herausgeber(in) |
Thornett, E.
|
| ISBN | 0-9553082-2-4 ; 978-0-9553082-2-2 |
| Verlag | Bedford: Euspen |
| Konferenzangaben | 7th International Conference of the European Society for Precision Engineering and Nanotechnology (euspen), Bremen, 20-24, May, 2007, UK |
| Zusammenfassung | The influence of the refractive index of air in interferometric measurements can be compensated by measuring the length with two different wavelengths and using the dispersion. As an improvement the air pressure and humidity are measured and the effective temperatur can be derived from both lengths values. Measurements with a two wavelength interferometer performed on a 50 m comparator exhibit a systematic deviation between the two wavelengths derived from the two wavelength method and a HeNe-laser interferometer. This indicates an inaccuracy of below 10-8L in the dispersion term of different Edlen formulas. |
