Angle amplification for nanoradian measurements.
A method to amplify the rotation angle of a mirror, based on multiple reflections between two quasi-parallel mirrors, is presented. The method allows rotations of fractions of nanoradians to be measured with a simple setup. The working principle, the experimental setup, and the results are presented.
Istituto Nazionale di Ricerca Metrologia, Strada delle Cacce 73, I-10125 Torino, Italy. m.pisani@inrim.it
Marco
M
Pisani
Milena
M
Astrua