Patent ID: 11940325
Assignee: THE PENN STATE RESEARCH FOUNDATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC G  B  Y | IPC B  G

Claim 12:
13. An additive manufacturing apparatus, comprising:
an energy source configured to melt, sinter, or fuse build material to form a part by imparting energy on a surface of build material, wherein imparting energy on the surface generates a melt pool and a plume on the surface;
a multi-spectral sensor, comprising:
an optical receiver configured to receive electromagnetic emissions from at least the melt pool and the plume;
a beam splitter configured to split the electromagnetic emissions into a first light beam and a second light beam, the first light beam corresponding to line emissions of a component of the build material, the second light beam corresponding to continuum emissions of the component of the build material;
a first filter configured to receive the first light beam and pass light having wavelengths within a range about the line emissions of the component of the build material and block or attenuate light having wavelengths outside the range about the line emissions of the component of the build material;
a second filter configured to receive the second light beam and pass light having wavelengths within range about the continuum emissions of the component of the build material and block or attenuate light having wavelengths outside the range about the continuum emissions of the component of the build material;

a processor configured to:
generate line data, SLine, representative of an intensity of the first light beam;
generate continuum data, SContinuum, representative of an intensity of the second light beam;
generate a value based on the SLine and SContinuum.