In-situ shape monitoring during multi-photon 3D laser printing

Roman Zvahelskyi; Tim Alletzhäusser; Pascal Kiefer; Jannis Weinacker; Martin Wegener

doi:10.1117/12.2692887

13 March 2024 In-situ shape monitoring during multi-photon 3D laser printing

Roman Zvahelskyi, Tim Alletzhäusser, Pascal Kiefer, Jannis Weinacker, Martin Wegener

Proceedings Volume PC12876, Laser 3D Manufacturing XI; PC1287603 (2024) https://doi.org/10.1117/12.2692887
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

We show that quantitative phase imaging (QPI) is a facile method for in-situ shape monitoring during multi-photon laser printing. In-situ QPI requires minimum hardware modifications of a commercial 3D laser printer and takes only a few seconds for data acquisition. We validate the approach by comparing in-situ phase reconstructions with independent ex-situ height measurements. Example applications are polymer refractive-index retrieval, shrinkage measurements, and shape reconstructions of printed microoptical devices such as microlenses and diffractive optical elements. Our research paves the way for routine monitoring of 2.5D printed structures and on-the-fly shape optimization of printed microoptics.

Conference Presentation

Citation Download Citation

Roman Zvahelskyi, Tim Alletzhäusser, Pascal Kiefer, Jannis Weinacker, and Martin Wegener "In-situ shape monitoring during multi-photon 3D laser printing", Proc. SPIE PC12876, Laser 3D Manufacturing XI, PC1287603 (13 March 2024); https://doi.org/10.1117/12.2692887

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