Picoradian deflection measurement with an interferometric quasi-autocollimator using weak value amplification

TL;DR

This paper introduces an interferometric quasi-autocollimator utilizing weak value amplification to achieve highly sensitive angular deflection measurements, with sensitivities surpassing 10 picoradians per root hertz in the 10-200 Hz range.

Contribution

It presents a novel interferometric device that employs weak value amplification for precise angular deflection measurements, insensitive to translations.

Findings

Achieved sensitivity better than 10 picoradians per root hertz

Operates effectively between 10 and 200 Hz

Demonstrated insensitivity to target translations

Abstract

We present an "interferometric quasi-autocollimator" that employs weak value amplification to measure angular deflections of a target mirror. The device has been designed to be insensitive to all translations of the target. We present a conceptual explanation of the amplification effect used by the device. An implementation of the device demonstrates sensitivities better than 10 picoradians per root hertz between 10 and 200 hertz.