Autoclaveable miniaturized video endoscopes with simplified flip-chip assembly

Erik Beckert; Frank Wippermann; Sarah Walther; Thomas Burkhardt; Bernhard Messerschmidt; Thomas Bartnitzek; Torsten Vahrenkamp; Ramona Eberhardt; Daniel Gäbler; Andreas Tünnermann

doi:10.1117/12.873074

22 February 2011 Autoclaveable miniaturized video endoscopes with simplified flip-chip assembly

Erik Beckert, Frank Wippermann, Sarah Walther, Thomas Burkhardt, Bernhard Messerschmidt, Thomas Bartnitzek, Torsten Vahrenkamp, Ramona Eberhardt, Daniel Gäbler, Andreas Tünnermann

Author Affiliations +

Proceedings Volume 7893, Endoscopic Microscopy VI; 78930B (2011) https://doi.org/10.1117/12.873074
Event: SPIE BiOS, 2011, San Francisco, California, United States

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.

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Erik Beckert, Frank Wippermann, Sarah Walther, Thomas Burkhardt, Bernhard Messerschmidt, Thomas Bartnitzek, Torsten Vahrenkamp, Ramona Eberhardt, Daniel Gäbler, and Andreas Tünnermann "Autoclaveable miniaturized video endoscopes with simplified flip-chip assembly", Proc. SPIE 7893, Endoscopic Microscopy VI, 78930B (22 February 2011); https://doi.org/10.1117/12.873074

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