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Proceedings Paper

Tight tolerances for large-volume precision-pressed plastic optics (COMPAS)
Author(s): Marc Wielandts; Rémi Wielandts; Ralf Leutz
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Paper Abstract

Ultra-precision molded polymer optics range from high precision imaging objectives to tiny lenses like those used in camera modules for cell phones, where centration tolerances and filling of small features is a challenge. We propose a manufacturing process termed Compression Molded Polymer Aspheres (COMPAS). Polymer preforms are inserted into mold cavities, and isothermally heated above glass point. Novel tooling has been developed to produce high volumes of COMPAS optics at reasonable cost and cycle time, using large scale parallelization of mold cavities. First results of the COMPAS process are very encouraging: shape accuracy (<500 nm peak-to-valley), surface centration (<5 μm), and birefringence (<20 nm/cm) are well below values typically measured for injection molded lenses. COMPAS lenses are also gate free. We describe details of the on-axis turning of arrays and multi-cavities (DPI) and the COMPAS precision polymer molding process. We describe the metaphysical background of disruptive engineering based on physical principles, which is the reason behind developing DPI and COMPAS.

Paper Details

Date Published: 7 August 2018
PDF: 5 pages
Proc. SPIE 10829, Fifth European Seminar on Precision Optics Manufacturing, 108290E (7 August 2018); doi: 10.1117/12.2318670
Show Author Affiliations
Marc Wielandts, Wielandts UPMT s.a. (Belgium)
Rémi Wielandts, Wielandts UPMT s.a. (Belgium)
Ralf Leutz, Wielandts UPMT s.a. (Belgium)

Published in SPIE Proceedings Vol. 10829:
Fifth European Seminar on Precision Optics Manufacturing
Rolf Rascher; Christian Schopf, Editor(s)

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