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ISSN: 1023-5086

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ISSN: 1023-5086

Scientific and technical

Opticheskii Zhurnal

A full-text English translation of the journal is published by Optica Publishing Group under the title “Journal of Optical Technology”

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DOI: 10.17586/1023-5086-2026-93-02-36-47

УДК: 533.9.082, 544.032.65

Use of dual-color optical pyrometry for determining the characteristics of flying non-point condensed phase particles produced during laser ablation of leucosapphire

Larichev M.N., Sidelnicov D., Abramova M.V., Belyaev G.E., Velichko A.M.
For Russian citation (Opticheskii Zhurnal):

Ларичев М.Н., Сидельников Д., Абрамова М.В., Беляев Г.Е., Величко А.М. Использование двухлучевой оптической пирометрии для определения характеристик летящих неточечных частиц конденсированной фазы, образующихся при лазерной абляции лейкосапфира // Оптический журнал. 2026. Т. 93. № 2. С. 36–47. http://doi.org/10.17586/1023-5086-2026-93-02-36-47

Larichev M.N., Sidelnikov D., Abramova M.V., Belyaev G.E., Velichko A.M. Use of dual-color optical pyrometry for determining the characteristics of flying non-point condensed phase particles produced during laser ablation of leucosapphire [in Russian] // Opticheskii Zhurnal. 2026. V. 93. № 2. P. 36–47. http://doi.org/10.17586/1023-5086-2026-93-02-36-47

 

For citation (Journal of Optical Technology):
-
Abstract:

Subject of study. Contribution of optical aberration parameters of the optical system of a two-color spatial pyrometer with perpendicularly directed registration channels to the values ​​of the determined characteristics of flying non-point particles (with sizes exceeding the spatial resolution of the pyrometer) of the condensed phase formed during laser ablation of alumina. The purpose of study. Development of a methodology enabling simultaneous determination of the temperature and size along the trajectory of the registered flying hot non-point particles, considering optical aberrations. Method. In this work, optical aberration characteristics of the optical system in the observation area of ​​the two-channel pyrometer were determined using objects simulating the trail of a moving hot particle. Following processing of experimental data from each registration channel takes those characteristics into consideration. Main results. The developed methodology provided the possibility of studying non-point particles, including determination of the physical size along the trajectory for particles visible in both channels, characterization of the ongoing transformations of the moving hot particles; reconstruction of the full 3D trajectory of a particle recorded in a single channel; calculation the effective temperature of the particle surface areas. Practical significance. The proposed approach can be used with the pyrometer in the development and implementation of technological processes associated with laser ablation (3D printing, welding, spraying), which will allow for express control of the parameters of the resulting condensed phase particles and adjusting the parameters of the process being implemented.

Keywords:

optical pyrometry, imaging, high-speed photography, laser ablation, aluminum oxide, particles, condensed phase

Acknowledgements:
this work was performed within the framework of the Fundamental Research Program of the Russian Academy of Sciences (№ FFZE-2025-0030) and had public funding.

OCIS codes: 120.4820, 100.3020, 100.2960

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