Dr. Samuel J. Hocker Profile

Dr. Samuel J. Hocker

at NASA Langley Research Ctr

SPIE Involvement:

Author

Publications (6)

Proceedings Article | 7 June 2024 Presentation + Paper

Thermal inspection of low emissivity surfaces using a pulsed light emitting diodes (PLED) heat source

Joseph Zalameda, Peter Spaeth, Samuel J. Hocker

Proceedings Volume 13047, 1304716 (2024) https://doi.org/10.1117/12.3016162

KEYWORDS: Inspection, Organic light emitting diodes, Emissivity, Aluminum, Infrared cameras, Image processing, Light emitting diodes, Thermography, Cameras, Reflection

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Proceedings Article | 7 June 2024 Presentation + Paper

Near-infrared in-situ measurements for the detection of keyhole porosity in autogenous Ti-6Al-4V welds

Joseph Zalameda, Samuel J. Hocker, Peter Spaeth, Brandon Widener

Proceedings Volume 13047, 130470X (2024) https://doi.org/10.1117/12.3014612

KEYWORDS: Cameras, Near infrared, Porosity, Inspection, Nondestructive evaluation, Principal component analysis, Covariance matrices, Computed tomography, Image processing, Additive manufacturing

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Proceedings Article | 9 May 2024 Presentation + Paper

Assessment of segmentation-induced deviations of porosity metrics in powder bed fusion additively manufactured components

Peter Spaeth, Erik Frankforter, Samuel Hocker, Joseph Zalameda

Proceedings Volume 12950, 1295003 (2024) https://doi.org/10.1117/12.3010907

KEYWORDS: X-rays, Image segmentation, Porosity, X-ray computed tomography, X-ray imaging, Education and training, Image registration, Cross validation, Additive manufacturing

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Proceedings Article | 12 June 2023 Presentation + Paper

Flash thermal diffusivity measurements and inspection of additively manufactured Ti-6Al-4V specimens with varying process parameters

Joseph Zalameda, Samuel J. A. Hocker, Erik Frankforter, Peter Spaeth, Andrew Kitahara

Proceedings Volume 12536, 1253608 (2023) https://doi.org/10.1117/12.2663546

KEYWORDS: Inspection, Porosity, X-rays, X-ray computed tomography, Image fusion, Lamps, Data modeling, Additive manufacturing, Thermography, X-ray imaging

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Proceedings Article | 27 May 2022 Presentation + Paper

Comparison of in-situ near infrared melt pool imagery to optical microscopy measurements

Joseph Zalameda, Samuel Hocker, Wesley Tayon, Joshua Fody, Brodan Richter

Proceedings Volume 12109, 1210902 (2022) https://doi.org/10.1117/12.2621037

KEYWORDS: Cameras, Optical microscopy, Near infrared, Sensors, Laser scanners, Calibration, Optical testing, Image filtering, Black bodies, Metals

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Proceedings Article | 12 April 2021 Presentation + Paper

Melt pool imaging using a configurable architecture additive testbed system

Joseph Zalameda, Samuel J. Hocker, Joshua Fody, Wesley Tayon

Proceedings Volume 11743, 117430E (2021) https://doi.org/10.1117/12.2585791

KEYWORDS: Imaging systems, Laser welding, Near infrared, Cameras, Additive manufacturing, Temperature metrology, Process modeling, Titanium, Thermal modeling, Sensors

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Showing 5 of 6 publications

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