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Spatial frequency modulation imaging for laser processing applications
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DOI：10.1016/j.addlet.2024.100231.png)
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Abstract
En 中文
Single element detection, spatial frequency modulation imaging (SPIFI) is deployed in a laser processing environment. SPIFI images are used to monitor a laser melting process, like that encountered during additive manufacturing, with an exposure time of 120 mu s, which enables real-time, in-situ monitoring of melt track formation coaxial with the processing laser. SPIFI images from a single photodiode are shown to be comparable to or better than white light camera images taken at the same numerical aperture. SPIFI deployed in this manner represents a disruptive new sensor metrology system that, when coupled with developing process models, can ultimately be used to validate statistically significant process parameter-signature-quality relationships with quantified uncertainty.
Keywords:
MELT POOL
QUALITY-CONTROL
HIGH-SPEED
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