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Optical Cluster Eye fabricated on wafer-level.

Julia Meyer1, Andreas Brückner, Robert Leitel

  • 1Fraunhofer-Institute for Applied Optics and Precision Engineering, Jena, Germany. julia.meyer@uni-jena.de

Optics Express
|September 22, 2011
PubMed
Summary

Wafer-level optics enables cost-effective miniaturized cameras. The novel Optical Cluster Eye system uses micro-optical fabrication for seamless, high-yield imaging with standard sensors.

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Area of Science:

  • Optics
  • Microfabrication
  • Camera Systems

Background:

  • Wafer-level optics offers a cost-effective method for miniaturized cameras through parallel fabrication.
  • Current micro-optical fabrication challenges include achieving required accuracy for complex, mm-scale optical elements.
  • Microlens array fabrication is a mature and controllable micro-optical process.

Purpose of the Study:

  • To propose a novel multi-aperture system, the Optical Cluster Eye, leveraging conventional micro-optical fabrication.
  • To demonstrate a wafer-level fabrication approach for miniaturized camera systems with high yield.
  • To enable the use of commercially available image sensors for seamless image stitching.

Main Methods:

  • Development of a multi-aperture camera system comprising numerous optical channels.

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  • Each channel captures a distinct segment of the total field of view.
  • Image stitching algorithms are employed to create a seamless final image.

    • Main Results:

    • The Optical Cluster Eye system achieves high yield fabrication on a wafer level.
    • The realized optics measure 2.2 × 2.9 mm² with a total track length of 1.86 mm.
    • The system successfully captures images at VGA video resolution.

    Conclusions:

    • The Optical Cluster Eye system effectively utilizes mature microlens array fabrication for miniaturized cameras.
    • This approach overcomes accuracy limitations of complex micro-optical elements.
    • Wafer-level fabrication of multi-aperture systems offers a viable path for cost-effective, high-performance imaging.