Bibliographic Details
| Title: |
Towards in-situ diagnostics of multi-photon 3D laser printing using optical coherence tomography |
| Authors: |
Roman Zvagelsky, Frederik Mayer, Dominik Beutel, Carsten Rockstuhl, Guillaume Gomard, Martin Wegener |
| Source: |
Light: Advanced Manufacturing, Vol 3, Iss 2, Pp 1-15 (2022) |
| Publisher Information: |
Light Publishing Group, 2022. |
| Publication Year: |
2022 |
| Collection: |
LCC:Manufactures
LCC:Applied optics. Photonics |
| Subject Terms: |
multi-photon 3d laser printing, optical coherence tomography, in-situ diagnostics, Manufactures, TS1-2301, Applied optics. Photonics, TA1501-1820 |
| More Details: |
In recent years, multi-photon 3D laser printing has become a widely used tool for the fabrication of micro- and nanostructures for a large variety of applications. Typically, thorough sample characterisation is key for an efficient optimisation of the printing process. To date, three-dimensional microscopic inspection has usually been carried out on finished 3D printed microstructures, that is, using ex-situ approaches. In contrast, in-situ 3D characterization tools are desirable for quickly assessing the quality and properties of 3D printed microstructures. Along these lines, we present and characterise a Fourier-domain optical coherence tomography (FD-OCT) system that can be readily integrated into an existing 3D laser lithography setup. We demonstrate its capabilities by examining different 3D printed polymer microstructures immersed in a liquid photoresist. In such samples, local reflectivity arises from the (refractive-index) contrasts between the polymerised and non-polymerised regions. Thus, the refractive index of the printed material can be extracted. Furthermore, we demonstrate that the reflectivity of polymer-monomer transitions exhibits time-dependent behaviour after printing. Supported by transfer-matrix calculations, we explain this effect in terms of the time-dependent graded-index transition originating from monomer diffusion into the polymer matrix. Finally, we show exemplary 3D reconstructions of printed structures that can be readily compared with 3D computer designs. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2689-9620 |
| Relation: |
https://doaj.org/toc/2689-9620 |
| DOI: |
10.37188/lam.2022.039 |
| Access URL: |
https://doaj.org/article/5f83479820c04507a8c434818c1e9953 |
| Accession Number: |
edsdoj.5f83479820c04507a8c434818c1e9953 |
| Database: |
Directory of Open Access Journals |
