Additive Manufacturing with Photo-Acoustic Tomography Defect Testing
AssigneeSeurat Technologies, Inc.
InventorsFrancis L. Leard, James A. DeMuth, Andrew J. Bayramian
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Abstract
An additive manufacturing method supporting layer by layer testing includes a layer test including generating a hammer beam using laser light having a first wavelength, generating a read-out beam using laser light having a second wavelength, directing the generated hammer beam toward a first layer on a part to provide an acoustic hammer pulse that induces surface movement of the part, and reading the surface movement of the part using the read-out beam directed to a second position on the part. Layers can be added and the layer test repeated.
Claims8
An additive manufacturing method comprising:
- adding a layer that defines at least a portion of a part using an additive writing system;
- directing laser beams toward the part to be read-out beams that travels back upon reaching the part;
- imposing spatial phase onto a reference beam;
- generating an image interferogram based on the reference and the read-out beams;
- and
- using an areal camera arranged to capture information that includes the image interferogram,
- wherein adding the layer comprises applying a correction that is determined based on the captured information.
Dependencies are inferred from the claim text.