An endoscopic lens with internal focusing

Henning Rehn; Hans Forrer; Christian Mehne; Alexander Betke; Neven Bobic; Tobias Schumm; Christian Graf; Kirsten Klein; Simon Hein; Arkadiusz Miernik

doi:10.1117/12.2632708

3 October 2022 An endoscopic lens with internal focusing

Henning Rehn, Hans Forrer, Christian Mehne, Alexander Betke, Neven Bobic, Tobias Schumm, Christian Graf, Kirsten Klein, Simon Hein, Arkadiusz Miernik

Author Affiliations +

Proceedings Volume 12217, Current Developments in Lens Design and Optical Engineering XXIII; 122170K (2022) https://doi.org/10.1117/12.2632708
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

We report optical and optomechanical design of a new endoscopic system for the urinary bladder. On the basis of the specification, key requirements of the optics are derived. The required high resolution goes hand in hand with a depth of field much smaller than the intended object distance range and raises the need for image focusing. Such a focus mechanism was realized in the small endoscope tip volume with the help of smart memory alloy wires and a matching optical and mechanical design. MTF measurements and practical tests demonstrate a proper function of a prototype of the device.

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Citation Download Citation

Henning Rehn, Hans Forrer, Christian Mehne, Alexander Betke, Neven Bobic, Tobias Schumm, Christian Graf, Kirsten Klein, Simon Hein, and Arkadiusz Miernik "An endoscopic lens with internal focusing", Proc. SPIE 12217, Current Developments in Lens Design and Optical Engineering XXIII, 122170K (3 October 2022); https://doi.org/10.1117/12.2632708

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