| Zugriffsnummer | 37430 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Spherical interferometry for the characterization of precision spheres |
| Autor(in); Institution |
Nicolaus, Arnold; 5.4, Interferometrie an Maßverkörperungen, PTB-Braunschweig
Bartl, Guido; 5.4, Interferometrie an Maßverkörperungen, PTB-Braunschweig
|
| Quelle/Jahr | Surface Topography: Metrology and Properties: 4 (2016), 3, 034007-1 - 034007-7 |
| ISSN | 2051-672X |
| DOI | |
| Verlag | London: IOP |
| Freie Schlagworte | spherical interferometry ; surface ; silicon sphere ; Avogadro's constant |
| Zusammenfassung | Interferometry with spherical wavefronts is usually used for characterizing precise optics. A special spherical interferometer was set up to measure the volume of high precision spheres used for the new definition of the SI unit kilogram, for which a fundamental constant, such as Planck's constant h or Avogadro's constant NA, was to be determined. Furthermore with this type of interferometer and with a special evaluating algorithm, absolute form deviations of spheres can be determined. With this knowledge, a sphere can be processed further to reach unrivaled small sphericity deviations. |
