论文期刊

Note: Enhancing the sensitivity of roll-angle measurement with a novel interferometric configuration based on waveplates and folding mirror




作者: J. Qi, Z. Wang, J. Huang, B. Yu, J. Gao and S. Donati
发表/完成日期: 2016-03-10
期刊名称: Review of Scientific Instruments
期卷: 87
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论文简介
A novel method for very high resolution measurement of roll angle on a transparent plate is developed theoretically and tested experimentally. The new optical configuration is based on the interferometric readout of phase shift accumulated on the double passage through half wave plate, together with a careful control of polarization state by means of quarter wave plate, and optimizing the tilt of the folding mirror. Sensitivity to roll angle is greatly enhanced and a gain coefficient exceeding 700 is found theoretically, based on Jones’ matrix analysis, with a 6-fold increase respect to previous results. In the experimental setup, at the optimum 36° incidence to retroreflector, we measured a gain coefficient of 340. Correspondingly, with an interferometerphase meter resolving 0.01°, a roll-angle resolution 0.1-arc sec is attained.
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