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Proceedings Paper

Research of built-in-type high precision angle encoder: emulation and experiment
Author(s): Valery P. Kiryanov; Alexey V. Kiryanov; Ilya F. Klistorin
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Paper Abstract

The accuracy of built-in-type encoder with an external diameter of 180 mm that is offered by the world leaders doesn't exceed ±2.5 angular seconds. A high accuracy angular built-in-type encoder with error about ±0.3 angular seconds for laser images generators is shown in this paper. An angle encoder was made using 165 mm raster that had error equal to ±1.1 angular seconds. The error spectrum had evident predominance of second harmonic. This peculiarity predetermined choice of encoder configuration with four reading heads. The encoder emulation result had predicted encoder error no more then ±0.25 angular seconds. Resulting error of virtual encoder was determined by summary contribution of 4, 8, 12 and 16 harmonics. An encoder resulting error was determined by special angle measuring test bench. Error of real encoder didn't exceed ±0.35 angular seconds. The error spectrum had both expected 4, 8, 12, 16 harmonics and unexpected 2, 3, 5, 7 ones. The difference between the results of emulation and experiment is analyzed in this paper. The problems of creation of angle measuring test bench with error no more than ±0.1 angular seconds using ROD-800 angle encoder (which has accuracy only ±1.0 angular seconds) have been discussed.

Paper Details

Date Published: 18 November 2008
PDF: 6 pages
Proc. SPIE 7138, Photonics, Devices, and Systems IV, 71380T (18 November 2008); doi: 10.1117/12.817993
Show Author Affiliations
Valery P. Kiryanov, Technological Design Institute of Scientific Instrument Engineering (Russian Federation)
Alexey V. Kiryanov, Technological Design Institute of Scientific Instrument Engineering (Russian Federation)
Ilya F. Klistorin, Technological Design Institute of Scientific Instrument Engineering (Russian Federation)


Published in SPIE Proceedings Vol. 7138:
Photonics, Devices, and Systems IV
Pavel Tománek; Dagmar Senderáková; Miroslav Hrabovský, Editor(s)

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