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Computational approach to interference phase detection and linearity error correction in laser interferometry
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SYSNO ASEP 0426201 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title Computational approach to interference phase detection and linearity error correction in laser interferometry Author(s) Řeřucha, Šimon (UPT-D) RID, ORCID, SAI
Šarbort, Martin (UPT-D) RID, ORCID, SAI
Buchta, Zdeněk (UPT-D) RID, SAI, ORCID
Číp, Ondřej (UPT-D) RID, SAI, ORCID
Lazar, Josef (UPT-D) RID, ORCID, SAINumber of authors 5 Source Title 21th annual International Conference on Advanced Laser Technologies ALT´13. Book of Abstracts. - Budva : University of Montenegro, 2013
S. 54Number of pages 1 s. Publication form Online - E Action ALT´13. Annual International Conference on Advanced Laser Technologies /21./ Event date 16.09.2013-20.09.2013 VEvent location Budva Country ME - Montenegro Event type WRD Language eng - English Country ME - Montenegro Keywords laser interferometry ; computational approach Subject RIV BH - Optics, Masers, Lasers R&D Projects GAP102/10/1813 GA ČR - Czech Science Foundation (CSF) ED0017/01/01 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EE2.3.30.0054 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) FR-TI2/705 GA MPO - Ministry of Industry and Trade (MPO) FR-TI1/241 GA MPO - Ministry of Industry and Trade (MPO) Institutional support UPT-D - RVO:68081731 Annotation Although the laser interferometry represents the most precise class of techniques in the field of precise measurement of geometrical quantities, its wide use in measurement systems is still accompanied by many unresolved challenges. One of these challenges it the complexity of underlying optical systems that makes the interferometry systems very sensitive and expensive devices. We present a novel approach to the interference phase detection in homodyne laser interferometry that aims at reduction of the optical complexity while the resolution is preserved. Our method employs a series of computational steps to infer a pair of signals in quadrature that allows to determine the interference phase with a sub-nanometre resolution from an interference signal from a non-polarising interferometer sampled by a single photodetector. The data processing covers a the phase detection as well as several errorcorrection and scale linearization techniques. The complexity trade-off is the use of laser beam with frequency modulation capability. The method was experimentally evaluated on a Michelson interferometer-based free-space setup and its performance has been compared to a traditional homodyne detection method.The results indicate the method is a feasible alternative for the traditional homodyne detection since it performs with comparable accuracy (< 0.5nm standard deviation), especially where the optical setup complexity is principal issue and the modulation of laser beam is not a heavy burden, for instance in multi-axis measurement systems or laser diode based systems. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2015
Number of the records: 1