Sigma Labs Inc (SASI)

[truthandlove]

From J. Manuf. Sci. Eng. "Two recent reports by Sigma Labs describe a heterogeneous sensing system to relate the thermal aspects of the L-PBF process to physical properties of the part, namely, the part density (porosity) [29,30]. One of these reports describes a hardware system incorporating four in situ sensors, consisting of two photodetectors, one pyrometer, and one position sensor to map the sensor signatures vis-à-vis the density of titanium alloy samples made under different laser power and velocity conditions [30]. The connection between the sensor signatures and part density is made via a trademarked proprietary metric called thermal emission density (TED™). The TED metric is reported to have a nearly one-to-one correlation with the part density. " glta
https://asmedigitalcollection.asme.org/manufacturingscience/article/140/9/091002/741453/Sensor-Based-Build-Condition-Monitoring-in-Laser