Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 77: Photonics – 3D Printing

Q 77.5: Talk

Friday, March 6, 2026, 15:30–15:45, P 2

Interferometric Measurements and Interative Metrology for the Shape Correction of 3D-Printed Microoptics — •Chris-Peter Winkler, Yanqiu Zhao, Leander Siegle, and Harald Giessen — 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany

We present an interferometric measurement and optimization approach for 3D-printed aspherical singlet and doublet micro-optics fabricated by grayscale lithography. The transmitted wavefront is measured using a lateral shear interferometer, allowing us to reconstruct the corresponding surface height profile of the printed lens, including contributions from surface deviations due to shrinkage and refractive-index modulations arising from density variations in the polymer. The reconstructed wavefront is decomposed into the first 20 Zernike modes using a least-squares fit to identify the dominant aberrations and filter high-frequency noise. Based on this information, the lens height profile is iteratively corrected. Starting from an initial 0.8 λ spherical aberration, we achieve a Strehl ratio of 0.95 after a single optimization iteration for an aspheric singlet lens with 630 mum diameter