Detection of structured laser beam centroid and its use for alignment

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24220%2F22%3A00010836" target="_blank" >RIV/46747885:24220/22:00010836 - isvavai.cz</a>
Alternative codes found
RIV/46747885:24510/22:00010836
Result on the web
<a href="https://cds.cern.ch/record/2849064" target="_blank" >https://cds.cern.ch/record/2849064</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Detection of structured laser beam centroid and its use for alignment
Original language description
A Structured Laser Beam (SLB) is a pseudo-non- diffractive optical beam. Its transverse profile is similar to a Bessel Beam (BB), hence its bright central core is surrounded by concentric circles. SLB can propagate with very low divergence over long distances. Propagation over 200 m has been tested with a divergence under 0.01 mrad. Therefore, the central core can still fit on the camera chip and its centroid position can be accurately detected, which is not the case for well-known Gaussian beams (GB). These properties make the SLB a promising candidate for long-distance alignment applications because it could be used as a reference line. The alignment accuracy is affected by the algorithms for centroid detection. In this work, different algorithms for centroid position detection are evaluated and com- pared on simulated data, namely the best fitting of a well-parameterized Bessel function and different alternations of the center of gravity methods. In addition to simulations, real data are obtained during experiments using a high- precision motorized stage to induce a known translation of a sensor resulting in misalignment. This misalignment is compared with the misalignment detected by an SLB sensor. Therefore, the potential of SLB for long-distance alignment is explored.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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