Observation of Laser Materials Processing by Means of High-Speed Imaging

Freitag, Christian; Arnold, Thomas; Boley, Meiko; Faas, Sebastian; Fetzer, Florian; Hagenlocher, Christian; Heider, Andreas; Jarwitz, Michael; Weber, Rudolf; Graf, Thomas

doi:10.1007/978-3-319-61491-5_9

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High-speed Imaging System1

Introduction1

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Cited by 2 publications

(2 citation statements)

References 17 publications

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“…Therefore, the melt pool position and shape was from the images in terms of the brighter zones [27].…”

Section: High-speed Imaging Systemmentioning

confidence: 99%

High-speed imaging and process characterization of coaxial laser metal wire deposition

Motta

Demir

Previtali

2018

Additive Manufacturing

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“…Therefore, the melt pool position and shape was from the images in terms of the brighter zones [27].…”

Section: High-speed Imaging Systemmentioning

confidence: 99%

High-speed imaging and process characterization of coaxial laser metal wire deposition

Motta

Demir

Previtali

2018

Additive Manufacturing

View full text Add to dashboard Cite

“…High-speed imaging and videography is important for a plethora of measurement situations such as for investigating chemical reactions 1 , fuel injection 2 , 3 , combustion 4 , 5 , plasma formation 6 , 7 and laser induced material damage 8 – 10 . The first instance of kHz imaging (2 kHz) can actually be traced back to 1927 when Edward G. Beardsley illuminated a fuel spray from an oil engine injection with 20 individual sparks in the Langley Research Center of the National Advisory Committee for Aeronautics (NACA, the precursor of NASA) 11 .…”

Section: Introductionmentioning

confidence: 99%

Beyond MHz image recordings using LEDs and the FRAME concept

Kornienko

Kristensson

Ehn

et al. 2020

Sci Rep

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Many important scientific questions in physics, chemistry and biology rely on high-speed optical imaging techniques for their investigations. These techniques are either passive, relying on the rapid readout of photoactive elements, or active, relying on the illumination properties of specially designed pulse trains. Currently, MHz imaging speeds are difficult to realize; passive methods, being dictated by electronics, cause the unification of high spatial resolution with high frame rates to be very challenging, while active methods rely on expensive and complex hardware such as femto- and picosecond laser sources. Here we present an accessible temporally resolved imaging system for shadowgraphy based on multiplexed LED illumination that is capable of producing four images at MHz frame rates. Furthermore as the LEDs are independent of each other, any light burst configuration can be obtained, allowing for instance the simultaneous determination of low- and high speed events in parallel. To the best of the authors’ knowledge, this is the fastest high speed imaging system that does not rely on pulsed lasers or fast detectors, in this case reaching up to 4.56 MHz.

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Observation of Laser Materials Processing by Means of High-Speed Imaging

Cited by 2 publications

References 17 publications

High-speed imaging and process characterization of coaxial laser metal wire deposition

High-speed imaging and process characterization of coaxial laser metal wire deposition

Beyond MHz image recordings using LEDs and the FRAME concept

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