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Optical Engineering

Implementation of an autofocus algorithm based on searching the best in-focus image into a table-top laser-induced breakdown spectroscopy setup
Author(s): Jan Novotný; Radomir Malina; Jozef Kaiser; Miroslav Liška; Michaela Galiova; Karel Novotný
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Paper Abstract

Laser-ablation based spectrochemical analytical methods could be used in applications in which the capability for spatially resolved analysis is required. Such analysis gives a 2-D or 3-D map of the monitored chemical elements. Here we introduce automation of a 2-D surface analysis in the laser-induced breakdown spectroscopy setup by implementation of an autofocus algorithm based on the evaluation of the image sharpness. The most suitable algorithm with respect to its speed, accuracy, and durability against digital noise is chosen by testing different gradient-based methods and methods working in the frequency domain.

Paper Details

Date Published: 1 October 2009
PDF: 10 pages
Opt. Eng. 48(10) 103604 doi: 10.1117/1.3250206
Published in: Optical Engineering Volume 48, Issue 10
Show Author Affiliations
Jan Novotný, Brno Univ. of Technology (Czech Republic)
Radomir Malina
Jozef Kaiser, Brno Univ. of Technology (Czech Republic)
Miroslav Liška, Brno Univ. of Technology (Czech Republic)
Michaela Galiova, Masaryk Univ. (Czech Republic)
Karel Novotný, Masaryk Univ. (Czech Republic)


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