Optical evaluation of polymer deposition for 3D printing
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2019
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ENCONTRO DE OUTONO DA SOCIEDADE BRASILEIRA DE FÍSICA, 42.
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Resumo
3D printing is a technology that is revolutionizing the productive sector [1]. It allows the production of free-
form components and systems. It may ¯nd application from biomedical to aerospace engineering, as well as
in the production of unique and speci¯c components needed in basic science laboratories. One of the most
common approaches for 3D printing is the fused deposition modeling were a plastic ¯lament is fused and
the component shape is modeled by layers deposition [2]. The success in the manufacture of the component is
related to the addition between successive deposited layers. Increasing the temperature of the ¯lament to ensure
perfect adhesion may compromise the desired shape and function characteristics for the component. Scanning
Electronic Microscopy (SEM) is the gold standard technique to ensure the ideal condition for the 3D printing
and evaluate the bonding between successive layers [2]. However, in this context, SEM is a destructive technique
and do not allow real time application. Low Coherence Interferometry (LCI) is an optical technique capable to
performing non-destructive tomography evaluation of scatter medium [3]. Using a Michelson interferometer to
measure the backscattered light intensity as a function of depth position associated to a lateral scanning it is
possible to obtain a cross-section image of the sample [3]. It is non-invasive, relatively inexpensive technique
and could allow real time application during manufacturing. The aim of this work was to investigate the use of
low coherence interferometry to evaluate the adhesion of successive layers on 3D printed plastic material. A set
of samples were manufactured using a 3D printing (Cliever CL1, Brazil), with layer thickness from 100¡250¹m
using PLA ¯lament. The sample were evaluated using a SEM and a commercial LCI (OCP930SR - Thorlabs
Inc.) and the images were compared. It was possible to observe a correlation on the observed fused ¯laments
between the images acquired by SEM and LCI proving that it is possible to use the optical technique as a
alternative for 3D printing quality evaluation.
Como referenciar
AMARAL, MARCELLO M.; PRETTO, LUCAS de; RAELE, MARCUS P. Optical evaluation of polymer deposition for 3D printing. In: ENCONTRO DE OUTONO DA SOCIEDADE BRASILEIRA DE FÍSICA, 42., 26-31 de maio, 2019, Aracaju, SE. Resumo... São Paulo, SP: Sociedade Brasileira de Física, 2019. Disponível em: http://repositorio.ipen.br/handle/123456789/30971. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.