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Proceedings Paper

Autoclaveable miniaturized video endoscopes with simplified flip-chip assembly
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Paper Abstract

Miniaturized video endoscopes with an imager located at the distal end and a simplified opto-mechanical layout are presented. They are based on a CMOS imager with 650 x 650 pixels of 2.8 μm pitch and provide straight view with 75° and 110° field of view at f/4.3. They have an outer diameter of 3 mm including the shell and a length of approx. 8 mm. The optics consist of polymer lenses in combination with a GRIN and a dispensed lens. Using a simple flip chip assembly, optical axis alignment better than 10 μm and a contrast of 30 % at 90 LP/mm was achieved. The 75° FOV system was sealed at the front window using a solderjetting technology, providing 10-9 mbar*l/s leakage rates even after several autoclave cycles.

Paper Details

Date Published: 22 February 2011
PDF: 9 pages
Proc. SPIE 7893, Endoscopic Microscopy VI, 78930B (22 February 2011); doi: 10.1117/12.873074
Show Author Affiliations
Erik Beckert, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Frank Wippermann, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Sarah Walther, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Thomas Burkhardt, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Bernhard Messerschmidt, Grintech GmbH (Germany)
Thomas Bartnitzek, VIA electronic GmbH (Germany)
Torsten Vahrenkamp, ficonTEC Service GmbH (Germany)
Ramona Eberhardt, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Daniel Gäbler, X-FAB Semiconductor Foundries AG (Germany)
Andreas Tünnermann, Friedrich-Schiller-Univ. Jena (Germany)


Published in SPIE Proceedings Vol. 7893:
Endoscopic Microscopy VI
Guillermo J. Tearney; Thomas D. Wang, Editor(s)

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