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Q: Fachverband Quantenoptik und Photonik

Q 60: Photonics IV

Q 60.2: Vortrag

Freitag, 10. März 2023, 11:15–11:30, A320

Complex aspherical singlet and doublet microoptics by grayscale 3D printing — •Leander Siegle, Simon Ristok, and Harald Gießen — 4th Physics Institute, University of Stuttgart

We demonstrate grayscale 3D printed aspherical singlet and doublet microoptical components and characterize and evaluate their excellent shape accuracy and optical performance. The typical two-photon polymerization (2PP) 3D printing process creates steps in the structure which is undesired for optical surfaces. We utilize two-photon grayscale lithography (2GL) to create step-free lenses. To showcase the 2GL process, the focusing ability of a spherical and aspherical singlet lens are compared. The surface deviations of the aspherical lens are minimized by an iterative design process, and no distinct steps can be measured. We design, print and optimize an air-spaced doublet lens with a diameter of 300 μm. After optimization, the residual shape deviation is less than 100 nm and 20 nm for the two lenses, respectively. We examine the optical performance with an USAF 1951 resolution test chart to find a resolution of 645 lp/mm.