Development of an OCT system for measuring machining defects on a texturing laser machine

Chays, Florian; STOECKLI, Harley; Bourquin, Stéphane; Giandomenico, Nicola

doi:10.1016/j.procir.2022.09.176

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…For industrial applications, long time recordings and analyses are important to monitor and in further step also control the laser micromachining processes. Some attempts were done using real-time depth measurement by optical coherence tomography (OCT) 11 . In this work, high speed process monitoring using Field Programmable Gate Array (FPGA) realtime hardware signal processing was applied.…”

Section: Introductionmentioning

confidence: 99%

High-speed heat accumulation temperature measurement in high-throughput laser surface texturing for advanced coating substrate preparation

Martan,

Moskal,

Beltrami

et al. 2024

Laser-Based Micro- And Nanoprocessing XVIII

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Laser material micro-processing with high repetition frequencies of laser pulses is able to initiate heat accumulation effects that can decrease processing rate and quality. In order to gain deeper insights into these effects, a temperature measurement system with nanosecond time resolution was developed using infrared detector and a set of parabolic mirrors. For measurement in more industrially relevant processes on larger areas, alternative configurations were developed: measurement through the scan head and multifocus ellipsoidal mirror. This work is initially focused on comparison of advantages and limitations of the developed measurement configurations by signal to noise ratio, field of view and measurable temperature range. The measurement systems were then used for the analysis of polygon scanner based highspeed laser surface texturing of steel and ceramics substrates as a preparation method for thermal spraying of coatings. GHz burst femtosecond laser ablation was analyzed and long-time process monitoring using FPGA hardware analysis was developed and performed for the laser texturing process.

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Section: Introductionmentioning

confidence: 99%