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Proceedings Paper

A non-destructive evaluation system for additive manufacturing based on acoustic signature analysis with laser Doppler vibrometry
Author(s): James Trolinger; Amit Lal; Andrei K. Dioumaev; Dave Dimas
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Paper Abstract

Every object possesses a unique acoustical spectrum/signature that is determined by its dimensions, materials, defects, and history. The signature can be read and analyzed by exciting the part and scanning the surface using Laser Doppler Velocimetry (LDV). Defects, tampering, inferior materials, and spec failures change the signature and can be detected by reading the signature. Finite element analysis (FEA) employed with the computer design and knowledge of material makeup of an object can predict its signature. Additional security is possible by programming a hidden authentication key printed during manufacturing. Such a readable signature offers many opportunities, especially in additive manufacturing. This paper describes the development and potential applications of this photonic tool.

Paper Details

Date Published: 18 August 2018
PDF: 12 pages
Proc. SPIE 10749, Interferometry XIX, 107490C (18 August 2018); doi: 10.1117/12.2320445
Show Author Affiliations
James Trolinger, MetroLaser, Inc. (United States)
Amit Lal, Optical Measurement Systems Corp. (United States)
Andrei K. Dioumaev, MetroLaser, Inc. (United States)
Dave Dimas, Univ. of California, Irvine (United States)

Published in SPIE Proceedings Vol. 10749:
Interferometry XIX
Katherine Creath; Jan Burke; Michael B. North Morris; Angela D. Davies, Editor(s)

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