Compact absolute shaft angular encoder based on diffractive optical elements

Victor Pavlovich Bessmeltsev; V. L. Goldin; E. M. Kurbatov; Alexander G. Poleshchuk; Andrey G. Sedukhin; V. V. Vileiko

doi:10.1117/12.484483

29 July 2002 Compact absolute shaft angular encoder based on diffractive optical elements

Victor Pavlovich Bessmeltsev, V. L. Goldin, E. M. Kurbatov, Alexander G. Poleshchuk, Andrey G. Sedukhin, V. V. Vileiko

Proceedings Volume 4900, Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life; (2002) https://doi.org/10.1117/12.484483
Event: Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life, 2002, Novosibirsk, Russian Federation

Abstract

A compact absolute shaft angular encoder with resolution of 5 arc seconds (18 bits) has been developed. It has the direct readout channel with 14-bit optical code disk and the interpolation channel for obtaining the additional 4 low-order bits by means of analog-to-digital conversion and processing of the quadrature signals from the interpolation track of the code disk. The small sizes of the encoder are achieved by employing special components. Among them are a multiple beam illuminator with diffractive Dammann grating, specialized electronics used for digital data reading and processing and implemented on the base of integrated linear photodetector array, and also a microcontroller with RISC-processor and programmable device.

Citation Download Citation

Victor Pavlovich Bessmeltsev, V. L. Goldin, E. M. Kurbatov, Alexander G. Poleshchuk, Andrey G. Sedukhin, and V. V. Vileiko "Compact absolute shaft angular encoder based on diffractive optical elements", Proc. SPIE 4900, Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life, (29 July 2002); https://doi.org/10.1117/12.484483

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