Mass-producible micro-optical elements by injection compression molding and focused ion beam structured titanium molding tools

We demonstrate mass production compatible fabrication of polymer-based micro Fresnel lenses by injection compression molding. The extremely robust titanium-molding tool is structured with high precision by focused ion beam milling. In order to achieve optimal shape accuracy in the titanium we use an...

Full description

Saved in:
Bibliographic Details
Published inOptics letters Vol. 45; no. 5; p. 1184
Main Authors Ristok, Simon, Roeder, Marcel, Thiele, Simon, Hentschel, Mario, Guenther, Thomas, Zimmermann, André, Herkommer, Alois M, Giessen, Harald
Format Journal Article
LanguageEnglish
Published United States 01.03.2020
Online AccessGet more information

Cover

More Information
Summary:We demonstrate mass production compatible fabrication of polymer-based micro Fresnel lenses by injection compression molding. The extremely robust titanium-molding tool is structured with high precision by focused ion beam milling. In order to achieve optimal shape accuracy in the titanium we use an iterative design optimization. The inverse Fresnel lens structured into the titanium is transferred to polymers by injection compression molding, enabling rapid mass replication. We show that the optical performance of the molded diffractive Fresnel lenses is in good agreement with simulations, rendering our approach suitable for applications that require compact and high-quality optical elements in large numbers.
ISSN:1539-4794
DOI:10.1364/OL.385599