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Proceedings Paper

Multiple-field approach for aberration correction in miniature imaging systems based on wafer-level production
Author(s): Eric Logean; Toralf Scharf; Nicolas Bongard; Hans Peter Herzig; Markus Rossi
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Paper Abstract

In mobile imaging systems, the most difficult element to integrate is the objective lens. Here we present an intermediate approach between the costly traditional objectives and the low-resolution objectives inspired by the compound eyes of insects. Our multi-field approach uses a small number of optical channels each imaging a portion of the desired field of view. The full-field image is reconstructed digitally. The optics of each channel is kept simple for wafer-level fabrication and its size is sufficient to obtain a reasonable resolution. We present the design and fabrication of a prototype using 9 plano-convex lenses for 9 channels. Glass lenses glued on a wafer are used to image a full-field of ±40° with an f-number of 3. The images obtained shows field curvature correction. A simple image reconstruction scheme is presented. In conclusion, multi-field objectives fabricated with micro-optics technology are thin, simple to mount, robust, and easily replicated.

Paper Details

Date Published: 7 March 2013
PDF: 9 pages
Proc. SPIE 8667, Multimedia Content and Mobile Devices, 86671E (7 March 2013); doi: 10.1117/12.2004390
Show Author Affiliations
Eric Logean, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Toralf Scharf, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Nicolas Bongard, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Hans Peter Herzig, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Markus Rossi, Heptagon (Switzerland)

Published in SPIE Proceedings Vol. 8667:
Multimedia Content and Mobile Devices
Reiner Creutzburg; Todor G. Georgiev; Dietmar Wüller; Cees G. M. Snoek; Kevin J. Matherson; David Akopian; Andrew Lumsdaine; Lyndon S. Kennedy, Editor(s)

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