In-line digital holographic tomography for two-photon polymerization-based additive manufacturing
Abstract
Two-Photon Polymerization (2PP) enables high-precision 3D micro- and nanoscale structuring, including complex internal features. However, conventional characterization methods such as scanning electron microscopy and laser scanning microscopy are largely limited to surface analysis and cannot access internal cavities and structures. Also, these techniques usually cannot be applied during the production process, but are limited to offline characterization. To address this limitation, a digital holographic microscope (DHM) is integrated into a 2PP system for in-situ, layer-resolved monitoring of the fabrication process. Holograms are recorded after each fabrication step and numerically reconstructed to obtain quantitative phase information. By evaluating incremental phase changes between successive layers, the build-up of internal structures can be interpreted during fabrication. The presented work focuses on the theoretical and methodological framework of this approach, establishing the basis for in-line holographic tomography in two-photon polymerization.
Details
- Organisation(s)
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PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
Hannover Centre for Optical Technologies (HOT)
- Type
- Conference contribution
- Publication date
- 05.03.2026
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials, Instrumentation, Condensed Matter Physics, Computer Science Applications, Applied Mathematics, Electrical and Electronic Engineering
- Electronic version(s)
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https://doi.org/10.1117/12.3080692 (Access:
Closed
)
