Reflection measurements in  TNO’s 30 kW laser facility

D. Meuken; S. A. van Binsbergen; L. C. W. Scheers; P. J. van den Berg; A. M. J. van Eijk

doi:10.1117/12.2634047

2 November 2022 Reflection measurements in TNO’s 30 kW laser facility

D. Meuken, S. A. van Binsbergen, L. C. W. Scheers, P. J. van den Berg, A. M. J. van Eijk

Proceedings Volume 12273, High-Power Lasers and Technologies for Optical Countermeasures; 122730D (2022) https://doi.org/10.1117/12.2634047
Event: SPIE Security + Defence, 2022, Berlin, Germany

Abstract

TNO has expanded its 30 kW HEL research facility with the capability to monitor specular and diffuse reflections of the laser beam. A capture screen and high-speed camera focus on dynamic specular reflections, while 15 individually placeable probes monitor the diffuse component under different angles. This paper introduces the reflection measurement capability and discusses the behaviour of steel and aluminium coupons under high-energy laser irradiation. Laser-material interaction was found to be rather predictable in thermal behaviour up to the perforation event. Reflections, however, showed a highly dynamic pattern, varying in magnitude and direction and depending on bulk material, material surface condition, phase state of the material (solid or liquid) and geometry. The difficulty of assessing proper stand-off distances for laser safety is illustrated.

Conference Presentation

Citation Download Citation

D. Meuken, S. A. van Binsbergen, L. C. W. Scheers, P. J. van den Berg, and A. M. J. van Eijk "Reflection measurements in TNO’s 30 kW laser facility", Proc. SPIE 12273, High-Power Lasers and Technologies for Optical Countermeasures, 122730D (2 November 2022); https://doi.org/10.1117/12.2634047

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