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Proceedings Paper

Errors of measurement by laser goniometer
Author(s): Mikhail Yu. Agapov; Milhail N. Bournashev
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Paper Abstract

The report is dedicated to research of systematic errors of angle measurement by a dynamic laser goniometer (DLG) on the basis of a ring laser (RL), intended of certification of optical angle encoders (OE), and development of methods of separation the errors of different types and their algorithmic compensation. The OE was of the absolute photoelectric angle encoder type with an informational capacity of 14 bits. Cinematic connection with a rotary platform was made through mechanical connection unit (CU). The measurement and separation of a systematic error to components was carried out with applying of a method of cross-calibration at mutual turns OE in relation to DLG base and CU in relation to OE rotor. Then the Fourier analysis of observed data was made. The research of dynamic errors of angle measurements was made with use of dependence of measured angle between reference direction assigned by the interference null-indicator (NI) with an 8-faced optical polygon (OP), and direction defined by means of the OE, on angular rate of rotation. The obtained results allow to make algorithmic compensation of a systematic error and in the total considerably to reduce a total error of measurements.

Paper Details

Date Published: 27 November 2000
PDF: 5 pages
Proc. SPIE 4316, International Conference on Lasers for Measurements and Information Transfer, (27 November 2000); doi: 10.1117/12.407681
Show Author Affiliations
Mikhail Yu. Agapov, St. Petersburg State Electrotechnical Univ. (Russia)
Milhail N. Bournashev, St. Petersburg State Electrotechnical Univ. (Russia)

Published in SPIE Proceedings Vol. 4316:
International Conference on Lasers for Measurements and Information Transfer
Vadim E. Privalov, Editor(s)

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