A reference-beam autocollimator with nanoradian sensitivity from mHz to kHz and dynamic range of 10^7

T. B. Arp, C. A. Hagedorn, S. Schlamminger +1

We describe an autocollimating optical angle sensor with a dynamic range of 9 mrad and nrad/sqrt(Hz) sensitivity at frequencies from 5 mHz to 3 kHz. This work improves the standard…