Publication detail

Implementation of an autofocus algorithm based on searching the best in-focus image into a table-top laser-induced breakdown spectroscopy setup

NOVOTNÝ, J. MALINA, R. KAISER, J. LIŠKA, M. GALIOVÁ, M.

Czech title

Použití algoritmu pro automatické nastavení vzorku do fokusacní roviny laseru v sestavě laserové spektroskopie (LIBS)

English title

Implementation of an autofocus algorithm based on searching the best in-focus image into a table-top laser-induced breakdown spectroscopy setup

Type

journal article - other

Language

en

Original 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.

Czech abstract

Článek pojednává o použití algoritmu pro automatické nastavení vzorku do fokusacní roviny laseru v sestavě laserové spektroskopie (LIBS). Algoritmus je testován na vybraných vzorcích. Je naznačen optimální nastavění algoritmu pro jednotlivé typy vzorků.

English 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.

Keywords in English

automatic focusing; autofocus; image sharpness; laser induced breakdown spectroscopy; Fourier transform; Pearson correlation; digital noise

RIV year

2009

Released

26.10.2009

ISSN

0091-3286

Journal

Optical Engineering

Volume

48

Number

10

Pages from–to

103604-1–103604-10

Pages count

10

BIBTEX


@article{BUT48678,
  author="Jan {Novotný} and Radomír {Malina} and Jozef {Kaiser} and Miroslav {Liška} and Michaela {Vašinová Galiová},
  title="Implementation of an autofocus algorithm based on searching the best in-focus image into a table-top laser-induced breakdown spectroscopy setup",
  journal="Optical Engineering",
  year="2009",
  volume="48",
  number="10",
  month="October",
  pages="103604-1--103604-10",
  issn="0091-3286"
}