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Proceedings Paper

Correcting distortion and braiding of micro-images from multi-aperture imaging systems
Author(s): Alexander Oberdörster; Andreas Brückner; Frank C. Wippermann; Andreas Bräuer
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Paper Abstract

Multi-aperture imaging systems inspired by insect compound eyes promise advances in both miniaturization and cost reduction of digital camera systems. Instead of a single lens stack with size and sag in the order of a few millimeters, the optical system consists of an array of microlenses. At a given field of view of the complete system, the focal lengths of the microlenses is a fraction of the focal length of a single-aperture system, reducing track length and increasing depth of field significantly. As each microimage spans only a small field of view, the optical systems can be simple. Because the microlenses have a diameter of hundreds of microns and a sag of tens of microns, they can be manufactured cost-effectively on wafer scale and with high precision. However, reaching a sufficient resolution for applications such as camera phones has been a challenge so far. We demonstrate a multi-aperture color camera system with approximately VGA resolution (700x550 pixels) and a remarkably short track length of 1.4 mm. The algorithm for correcting optical distortion of the microlenses and combining the microimages into a single image is the focus of this presentation.

Paper Details

Date Published: 17 February 2011
PDF: 13 pages
Proc. SPIE 7875, Sensors, Cameras, and Systems for Industrial, Scientific, and Consumer Applications XII, 78750B (17 February 2011); doi: 10.1117/12.876658
Show Author Affiliations
Alexander Oberdörster, Fraunhofer Institute for Optics and Precision Engineering (Germany)
Andreas Brückner, Fraunhofer Institute for Optics and Precision Engineering (Germany)
Frank C. Wippermann, Fraunhofer Institute for Optics and Precision Engineering (Germany)
Andreas Bräuer, Fraunhofer Institute for Optics and Precision Engineering (Germany)


Published in SPIE Proceedings Vol. 7875:
Sensors, Cameras, and Systems for Industrial, Scientific, and Consumer Applications XII
Ralf Widenhorn; Valérie Nguyen, Editor(s)

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