Modified Cyclic Interferometer for measurement of nanoradian tilt with multifold sensitivity

A modified cyclic interferometer and multiple reflections modified cyclic interferometer have been developed which uses a double-sided mirror (DSM) to measure the small tilt angle in the nanoradian range. These interferometers provide robust setups for the measurement of tilt with multifold sensitivity compared to the usual interferometers. The designs of the interferometers, theory for tilt, relative sensitivity, and experiment results to verify them are presented.