Single beam interferometric angle measurement
Résumé
We present a new application of the Nomarski interferometer, to measure the angular position of a parallel laser beam with interferometric precision. In our experimental realization we reach a resolution of 3e-9 rad (6e-4 arcsec) for 1 kHz bandwidth in a 2e-2 rad (1 deg) range. This alternative to the optical lever technique features absolute calibration, independence of the sensitivity on the thermal drifts, and wide range of measurement at full accuracy.
Origine | Fichiers produits par l'(les) auteur(s) |
---|