Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 9: Photonics (3D Print) (joint session Q/K)

Q 9.1: Vortrag

Montag, 10. März 2025, 17:00–17:15, HS V

Lateral Shear Interferometry for Wavefront Measurements of 3D-Printed Micro-Optics — •Yanqiu Zhao, Lunwei Wang, Jan-Niklas Bauer, Leander Siegle, Julian Schwab, Florian Mangold, and Harald Giessen — 4th Physics Institute and Stuttgart Research Center of Photonic Engineering, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany

3D-printed micro-optics offer distinct advantages in terms of precision and compact size, enabling them to navigate narrow human tissues, including arteries, to capture clear images of their surroundings. This capability necessitates a meticulous quality control process, not only of the lens shapes, but also of the propagating wavefronts.

Thus, we carry out such measurements on 3D-printed micro-optics to assess their quality comprehensively. Wavefront measurements provide a more holistic evaluation of the micro-optics performance when compared to conventional shape measurements. The micro-optics used in our study are fabricated using a Nanoscribe Quantum X and are printed directly on substrates or on optical fibers, also comparing simple 2-photon printing with 2-photon gray scale lithography.

We demonstrate consistent and precise wavefront measurements using a simple shear plate interferometer setup. Unlike direct wavefront measurements, shear interferograms reveal the spatial wavefront derivative. By analyzing the interferogram fringes, we extract wavefront information that can be fed back into the design process within an iterative loop. This process supports quality improvement for 3D-printed micro-optics.

Keywords: 3D-printed micro-optics; shear interferogram; wavefront retrieval; micro-photonics