On construction of laser acousto-optical heterodyne interferometers with push-pull measurement of product motions
The article discusses the implementation of a differential pushpull measurement method using a phase interpolator and a phase meter in an acousto-optical (AO) heterodyne laser interferometer of displacements (in future –a laser interferometer). To reduce the noise level in the measuring signal, a...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Omsk State Technical University, Federal State Autonoumos Educational Institution of Higher Education
2020-06-01
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| Series: | Омский научный вестник |
| Subjects: | |
| Online Access: | https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2020/3%20(171)/92-98%20%D0%9B%D0%B5%D1%83%D0%BD%20%D0%95.%20%D0%92..pdf |
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| Summary: | The article discusses the implementation of a differential pushpull measurement method using a phase interpolator and a phase
meter in an acousto-optical (AO) heterodyne laser interferometer
of displacements (in future –a laser interferometer). To reduce the
noise level in the measuring signal, a phase locked loop system
with a small jitter has been introduced. In the first measure at the
beginning of the object’s movement due to the high accuracy of
the phase meter, so-called «slow precise» measurements with high
resolution, up to ≈λ/10000, where λ is the wavelength of the laser
radiation. For high-speed object motion the clock of «fast rough»
measurements is used when the high-speed phase interpolator is
running and the phase meter is locked. This push-pull principle
of operation of the laser interferometer improves the dynamic and
metrological parameters of object motion measurements. |
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| ISSN: | 1813-8225 2541-7541 |