Determination of laser beam focus position based on secondary speckles pattern analysis

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autorinnen und Autoren: Alexeev I, Wu J, Karg M, Zalevsky Z, Schmidt M
Zeitschrift: Applied Optics
Jahr der Veröffentlichung: 2017
Band: 56
Heftnummer: 26
Seitenbereich: 7413-7418
ISSN: 2155-3165
Sprache: Englisch


Proper positioning of a laser beam focus is a universal problem for various applications that does not have a universal solution. Quite often the taken approach relies on some sort of a calibration and temporal stability of the laser and the optical train. While such an approach can be suitable for a large number of applications its applicability becomes limited in the cases where the laser beam properties uncontrollably change with time. The latter can occur due to the thermal effects, for example. In those cases, the laser focus positioning method should include direct analysis of the laser beam properties. In this contribution we present a simple optical method based on the secondary speckles pattern analysis suitable for determination of the absolute focal spot position. The method does not require any a priori knowledge of the laser beam properties and is suitable for various diffuse or partially diffuse surfaces of interest.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Alexeev, Ilya
Lehrstuhl für Photonische Technologien
Karg, Michael
Lehrstuhl für Photonische Technologien
Schmidt, Michael Prof. Dr.-Ing.
Lehrstuhl für Photonische Technologien

Zusätzliche Organisationseinheit(en)
Lehrstuhl für Photonische Technologien
Erlangen Graduate School in Advanced Optical Technologies
Sonderforschungsbereich 814/3 Additive Fertigung
Zentralinstitut für Neue Materialien und Prozesstechnik

Einrichtungen weiterer Autorinnen und Autoren

Bar-Ilan University


Additive Fertigung
Lehrstuhl für Photonische Technologien


Alexeev, I., Wu, J., Karg, M., Zalevsky, Z., & Schmidt, M. (2017). Determination of laser beam focus position based on secondary speckles pattern analysis. Applied Optics, 56(26), 7413-7418.

Alexeev, Ilya, et al. "Determination of laser beam focus position based on secondary speckles pattern analysis." Applied Optics 56.26 (2017): 7413-7418.


Zuletzt aktualisiert 2018-21-10 um 12:55