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Raphael Vernet

Sebastien Devroe

Antoine Anneton

Pascal Belaubre

A method for detecting defects in a layer of additive manufacturing powder deposited on a work zone, comprises the steps of: i. acquiring an image of a layer of additive manufacturing powder, ii. determining a discrete spectral representation of the image acquired, iii. filtering the discrete spectral representation of the image acquired in frequency terms, iv. determining a filtered image from the filtered discrete spectral representation of the image acquired, and v. analyzing the filtered image so as to detect defects.

Method for detecting defects in an additive manufacturing powder layer deposited on a working area

A removable calibration plate () comprises a sheet () comprising an upper face () intended to face towards the powerful incident-radiation beam, and bearing a reference marking () and being intended to receive a test marking (), and a lower face (). The plate () comprises an etching layer () to be etched by a powerful incident-radiation beam (F), this layer being secured to the upper face () of the sheet () and opaque to visible light, and being able to be destroyed locally by the powerful incident-radiation beam (F) in order to form the at least one test marking (), the sheet () being transparent to visible light, the lower face () of the sheet () being frosted.

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CEBAZAT, France

Raphael Vernet