ANGLE PRISM-BASED LASER INTERFEROMETER FOR HIGH PRESISION MEASUREMENT OF ANGULAR VIBRATION

Wan-Sup Cheung, Cheol-Ung Cheong

Abstract

This paper introduces a new "angle-prism"-based laser interferometer designed for high-precision measurement of angular vibration. The angle prism, fixed on the centre of the rotating axis, is shown to converter its angular motion into the path difference between two parallel laser beams. Their path difference provides a new way of measuring the angular displacement. This angular displacement measurement method is obviously shown to present a new primary method for the calibration of angular vibration pickups. In comparison to the traditional primary calibration methods in ISO/DIS 16063-15, the suggested one is shown to provide more robustness even for the eccentricity of rotating axis and the unwanted plane motion of the pickup holder. Detailed theoretical and experimental results are presented in this paper.

Keywords

Angular vibration, primary calibration, angular vibration measurement, angle-prism interferometer

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PWC-2006-TC22-010u.pdf

DOI

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IMEKO TC

TC22 - Vibration Measurement

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