Improving the circuitry of high-precision high-speed acousto-optic laser interferometers of displacements with frequency matching of component blocks and double heterodyning at phototransformation stage
The article discusses the development of the circuitry of acousto-optic (AO) laser displacement interferometers (LDI) and the values of resolution and speed of controlled displacements achieved by them. The issues of frequency matching of blocks of AO LDI are discussed: AO modulator, photodetect...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Omsk State Technical University, Federal State Autonoumos Educational Institution of Higher Education
2022-06-01
|
| Series: | Омский научный вестник |
| Subjects: | |
| Online Access: | https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2022/%E2%84%96%203%20(183)%20(%D0%9E%D0%9D%D0%92)/108-116%20%D0%9B%D0%B5%D1%83%D0%BD%20%D0%95.%20%D0%92.,%20%D0%A8%D0%B0%D1%85%D0%B0%D0%BD%D0%BE%D0%B2%20%D0%90.%20%D0%95.,%20%D0%A1%D0%B0%D0%BC%D0%BE%D0%B9%D0%BB%D0%BE%D0%B2%20%D0%A1.%20%D0%AE.,%20%D0%9A%D0%BE%D0%BB%D0%BE%D0%B1%D0%BE%D0%B2%20%D0%90.%20%D0%AE..pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The article discusses the development of the circuitry of
acousto-optic (AO) laser displacement interferometers (LDI) and the values of resolution and speed of controlled
displacements achieved by them.
The issues of frequency matching of blocks of AO LDI are
discussed: AO modulator, photodetector device (FDD) and
frequency generator. The features of phototransformation of
the FDD under its illumination by three spatially combined
optical streams are studied. Of these, two streams are of
different frequencies, created as a result of diffraction in
the AO modulator and are used to measure the phase
shift from the controlled displacements of the object in the
AO LDI. The third optical stream is amplitude-modulated
with a frequency close to the difference frequency of the
first two optical streams. This technique leads to a twofold
transfer (double heterodination) of the phase shift from the
offsets to the electrical signal of the difference frequency
between the three optical streams.
The schemes of AO LDI with a constant value of the
frequency of the amplitude-modulated optical flow and
with its auto-tuning are considered. The features of the
use of cooled FDD in AO LDI are discussed. |
|---|---|
| ISSN: | 1813-8225 2541-7541 |