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Proceedings Paper

Optical design rules of a camera module with a liquid lens and principle of command for AF and OIS functions
Author(s): Eric Simon; Bruno Berge; Franck Fillit; Hilario Gaton; Martin Guillet; Olivier Jacques-Sermet; Frédéric Laune; Julien Legrand; Mathieu Maillard; Nicolas Tallaron
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Paper Abstract

We have developed a miniature liquid lens component based on electro-wetting. It is designed to be plugged on a fix focus camera module lens to provide both optical image stabilization (OIS) and auto-focus (AF) functions without any mobile mechanical parts. The OIS/AF liquid lens component features a conical shape supporting the liquid interface in order to maintain a stable optical axis and a multi-electrode design able to induce an average tilt of the liquid interface when a bias voltage is applied to the different electrodes. The miniature size of the OIS/AF liquid lens component is well adapted to imaging applications with ¼ inch, 1/3 inch and possibly 1/2.5 inch sensor formats. We will present general rules for the optical design with an OIS/AF liquid lens. In this context, we will describe a simple calculation, based on the well known Maréchal criterion, to estimate the optical wave front error requirement of an optical component positioned in the aperture stop plane of an imaging lens design to perform images with a pixel resolution quality. We will also present the principle of command of a multi-electrode liquid lens in order to perform AF and OIS functions with an optimal image quality.

Paper Details

Date Published: 5 November 2010
PDF: 14 pages
Proc. SPIE 7849, Optical Design and Testing IV, 784903 (5 November 2010); doi: 10.1117/12.871634
Show Author Affiliations
Eric Simon, Varioptic SA (France)
Bruno Berge, Varioptic SA (France)
Franck Fillit, Varioptic SA (France)
Hilario Gaton, Varioptic SA (France)
Martin Guillet, Varioptic SA (France)
Olivier Jacques-Sermet, Varioptic SA (France)
Frédéric Laune, Varioptic SA (France)
Julien Legrand, Varioptic SA (France)
Mathieu Maillard, Varioptic SA (France)
Nicolas Tallaron, Varioptic SA (France)


Published in SPIE Proceedings Vol. 7849:
Optical Design and Testing IV
Yongtian Wang; Julie Bentley; Chunlei Du; Kimio Tatsuno; Hendrik P. Urbach, Editor(s)

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