Open AccessPrecise optical registration of fine-structured electrical sparks and related challenges
Author(s) -
Khristina Smaznova,
A. I. Khirianova,
E. V. Parkevich,
Mikhail Medvedev,
Evgenia A. Varaksina,
T. F. Khirianov,
А. В. Огинов,
A. S. Selyukov
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.431837
Subject(s) - spark (programming language) , optics , laser , image quality , computer science , quality (philosophy) , image resolution , materials science , physics , image (mathematics) , computer vision , quantum mechanics , programming language
Fine-structured sparks naturally formed in electrical gas discharges are challenging objects of optical research. The veracity of the spark structure image obtained by laser probing techniques is still a subject for discussion due to possible distortions introduced by the employed optical setup. We thoroughly analyze this issue by simulating the spark image formation and evaluating the effect of the setup response function on the spark pattern quality. The latter turns out to dramatically suffer from the defocusing effect, whereas the spark fine structure is reliably resolved only by optics having a spatial resolution close to several micrometers.