Wideband electronic block of laser interferometric system for measurements of quick-changing angle of scanner rotor rotation

Viktor P. Bessmel'tsev; V. N. Burnashov

doi:10.1117/12.248650

23 August 1996 Wideband electronic block of laser interferometric system for measurements of quick-changing angle of scanner rotor rotation

Viktor P. Bessmel'tsev, V. N. Burnashov

Author Affiliations +

Proceedings Volume 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1996) https://doi.org/10.1117/12.248650
Event: Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 1996, Ancona, Italy

Abstract

The most simple interferometric systems of the `direct current' have relatively low maximum of permissible velocity of displacement of interferometer reflectors because of inability of providing of shift of phase of photoreceiver output signals equal to (pi) /2 for this velocity. We developed electronic block for interferometric system of `direct current', which doesn't impose significant restrictions on the velocity characteristics. When frequency f of photoreceiver output signals exceeds chosen reference frequency f_r equals 100 divided by 200 kHz, the sign of velocity is stored and is used in process of measurements for count pulses while f > f_r. This method doesn't demand the shift of signal phases to be equal to (pi) /2 for the normal performance of block. The analysis of the results of joint processing of output signals of photoreceivers shows that frequency of output and input signals of photo-receiver may be considered as signed value, which sign is determined by the displacement direction of one of interferometer reflectors.

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Viktor P. Bessmel'tsev and V. N. Burnashov "Wideband electronic block of laser interferometric system for measurements of quick-changing angle of scanner rotor rotation", Proc. SPIE 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (23 August 1996); https://doi.org/10.1117/12.248650

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KEYWORDS

Signal processing

Interferometry

Interferometers

Reflectors

3D scanning

Laser scanners

Artificial intelligence

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