Nowadays, optical methods are widely used to measure the movements of various objects. In this case, it is necessary to measure both longitudinal displacements at a large distance, and transverse ones. Such tasks have to be solved when measuring the displacements of the cutting tools of machine tools. Among the optical methods, the most accurate is the method of heterodyne interferometry. However, this method does not allow making absolute measurements, since the period of the interference pattern is commensurate with the wavelength of light, which requires counting the number of stripes. In addition, the readjustment of this method requires two-frequency lasers and rather complex optical and electronic systems, which significantly complicates their application. To solve this problem, we used the method of heterodyne interferometry developed by the authors, which, in contrast to the known methods, allows us to make absolute measurements of the parameters of objects. This is achieved by creating a period of the interference pattern, which is equal to the speed of sound in the acousto-optical modulator divided by the modulator control frequency. The result was aa block diagram of a device for measuring transverse and longitudinal displacements of objects by the heterodyne method is developed. Analytical expressions are obtained for calculating the signal strength at the photodetector, the periods of interference patterns, the phase shift depending on the transverse and longitudinal displacements, the measurement range and the measurement accuracy, which allowed us to determine the main parameters of the device. To confirm the results obtained, an experiment was carried out. For this, a block diagram of the experiment was developed, with the help of which the influence of the beam divergence on the period of the interference pattern was determined. The experiment showed good agreement between theory and experiment.
| Published in | World Journal of Applied Physics (Volume 6, Issue 3) |
| DOI | 10.11648/j.wjap.20210603.11 |
| Page(s) | 41-46 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2024. Published by Science Publishing Group |
Laser, Acousto-Optic Modulator, Photodetector, Phase Meter, Microprocessor
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APA Style
Arkady Arsenyevich Titov, Mikhail Mikhailovich Bakharev. (2021). Heterodyne Meter of Transverse and Longitudinal Displacements of Objects. World Journal of Applied Physics, 6(3), 41-46. https://doi.org/10.11648/j.wjap.20210603.11
ACS Style
Arkady Arsenyevich Titov; Mikhail Mikhailovich Bakharev. Heterodyne Meter of Transverse and Longitudinal Displacements of Objects. World J. Appl. Phys. 2021, 6(3), 41-46. doi: 10.11648/j.wjap.20210603.11
AMA Style
Arkady Arsenyevich Titov, Mikhail Mikhailovich Bakharev. Heterodyne Meter of Transverse and Longitudinal Displacements of Objects. World J Appl Phys. 2021;6(3):41-46. doi: 10.11648/j.wjap.20210603.11
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Download@article{10.11648/j.wjap.20210603.11,
author = {Arkady Arsenyevich Titov and Mikhail Mikhailovich Bakharev},
title = {Heterodyne Meter of Transverse and Longitudinal Displacements of Objects},
journal = {World Journal of Applied Physics},
volume = {6},
number = {3},
pages = {41-46},
doi = {10.11648/j.wjap.20210603.11},
url = {https://doi.org/10.11648/j.wjap.20210603.11},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.wjap.20210603.11},
abstract = {Nowadays, optical methods are widely used to measure the movements of various objects. In this case, it is necessary to measure both longitudinal displacements at a large distance, and transverse ones. Such tasks have to be solved when measuring the displacements of the cutting tools of machine tools. Among the optical methods, the most accurate is the method of heterodyne interferometry. However, this method does not allow making absolute measurements, since the period of the interference pattern is commensurate with the wavelength of light, which requires counting the number of stripes. In addition, the readjustment of this method requires two-frequency lasers and rather complex optical and electronic systems, which significantly complicates their application. To solve this problem, we used the method of heterodyne interferometry developed by the authors, which, in contrast to the known methods, allows us to make absolute measurements of the parameters of objects. This is achieved by creating a period of the interference pattern, which is equal to the speed of sound in the acousto-optical modulator divided by the modulator control frequency. The result was aa block diagram of a device for measuring transverse and longitudinal displacements of objects by the heterodyne method is developed. Analytical expressions are obtained for calculating the signal strength at the photodetector, the periods of interference patterns, the phase shift depending on the transverse and longitudinal displacements, the measurement range and the measurement accuracy, which allowed us to determine the main parameters of the device. To confirm the results obtained, an experiment was carried out. For this, a block diagram of the experiment was developed, with the help of which the influence of the beam divergence on the period of the interference pattern was determined. The experiment showed good agreement between theory and experiment.},
year = {2021}
}
TY - JOUR T1 - Heterodyne Meter of Transverse and Longitudinal Displacements of Objects AU - Arkady Arsenyevich Titov AU - Mikhail Mikhailovich Bakharev Y1 - 2021/07/28 PY - 2021 N1 - https://doi.org/10.11648/j.wjap.20210603.11 DO - 10.11648/j.wjap.20210603.11 T2 - World Journal of Applied Physics JF - World Journal of Applied Physics JO - World Journal of Applied Physics SP - 41 EP - 46 PB - Science Publishing Group SN - 2637-6008 UR - https://doi.org/10.11648/j.wjap.20210603.11 AB - Nowadays, optical methods are widely used to measure the movements of various objects. In this case, it is necessary to measure both longitudinal displacements at a large distance, and transverse ones. Such tasks have to be solved when measuring the displacements of the cutting tools of machine tools. Among the optical methods, the most accurate is the method of heterodyne interferometry. However, this method does not allow making absolute measurements, since the period of the interference pattern is commensurate with the wavelength of light, which requires counting the number of stripes. In addition, the readjustment of this method requires two-frequency lasers and rather complex optical and electronic systems, which significantly complicates their application. To solve this problem, we used the method of heterodyne interferometry developed by the authors, which, in contrast to the known methods, allows us to make absolute measurements of the parameters of objects. This is achieved by creating a period of the interference pattern, which is equal to the speed of sound in the acousto-optical modulator divided by the modulator control frequency. The result was aa block diagram of a device for measuring transverse and longitudinal displacements of objects by the heterodyne method is developed. Analytical expressions are obtained for calculating the signal strength at the photodetector, the periods of interference patterns, the phase shift depending on the transverse and longitudinal displacements, the measurement range and the measurement accuracy, which allowed us to determine the main parameters of the device. To confirm the results obtained, an experiment was carried out. For this, a block diagram of the experiment was developed, with the help of which the influence of the beam divergence on the period of the interference pattern was determined. The experiment showed good agreement between theory and experiment. VL - 6 IS - 3 ER -
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