ON THE POSSIBILITY OF COMPLETE SUPPRESSION OF THE DISTORTING CONTRIBUTION OF THE MEASUREMENT ERROR DUE TO INACCURACY OF DIFFRACTION GRATING MANUFACTURING
V.P. Kiryanov1, A.V. Kiryanov1,2
1Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk State Technical University, Novosibirsk, Russia
Keywords: angle encoders, instrumental error, complementary comb filters, simple moving average filter, diffraction grating
Abstract
The possibility of complete suppression of the instrumental error caused by inaccuracy of manufacturing of an angle-measuring structure, realized at an arbitrary form of the field of interaction of light radiation with the topology of the measuring structure is shown. This possibility is achieved by choosing a necessary structure of the encoder for which the principle of coherence of the complementary comb filters formed in the encoder is provided.
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