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.
© 2006 Optical Society of America
Instrumentation, Measurement, and Metrology
Original Manuscript: August 12, 2005
Manuscript Accepted: September 21, 2005
Marco Pisani and Milena Astrua, "Angle amplification for nanoradian measurements," Appl. Opt. 45, 1725-1729 (2006)