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Proceedings Paper

Tunable compound eye cameras
Author(s): Daniel Pätz; Steffen Leopold; Fabian Knöbber; Stefan Sinzinger; Martin Hoffmann; Oliver Ambacher
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Paper Abstract

We present design and realization concepts for thin compound eye cameras with enhanced optical functionality. The systems are based on facets with individually tunable focus lengths and viewing angles for scanning of the object space. The active lens elements are made of aluminum nitride (AlN)/nanocrystalline diamond (NCD) membranes. This material system allows slow thermally actuated elements with a large deformation range as well as fast piezoelectric elements with a smaller deformation range. Due to the extreme mechanical stability of these materials, we are able to realize microoptical components with optimum surface qualities as well as an excellent long-term stability. We use facets of microlenses with 1 mm in diameter and a tunable focusing power to compensate for the focus shift for different viewing angles during the scanning procedure. The beam deflection for scanning is realized either by laterally shifting spherical elements or by a tunable microprism with reduced aberrations. For both actuators we present a design, fabrication concept and first experimental results.

Paper Details

Date Published: 13 May 2010
PDF: 7 pages
Proc. SPIE 7716, Micro-Optics 2010, 77160K (13 May 2010); doi: 10.1117/12.854532
Show Author Affiliations
Daniel Pätz, Technische Univ. Ilmenau (Germany)
Steffen Leopold, Technische Univ. Ilmenau (Germany)
Fabian Knöbber, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Stefan Sinzinger, Technische Univ. Ilmenau (Germany)
Martin Hoffmann, Technische Univ. Ilmenau (Germany)
Oliver Ambacher, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)

Published in SPIE Proceedings Vol. 7716:
Micro-Optics 2010
Hugo Thienpont; Peter Van Daele; Jürgen Mohr; Hans Zappe, Editor(s)

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