Use liquid lens to do Autofocu...

Variable liquid lens_Philips SPIE2006Variable liquid lenses for electronic products
Benno H.W. Hendriks, Stein Kuiper, Marco A.J. van As, Christel A. Renders and Teus W. Tukker Philips Research Laboratories, Prof. Holstlaan 4, 5656 AA Eindhoven, The Netherlands
ABSTRACT
The design, manufacturing and application of variable liquid lenses are discussed. The interface between the two immiscible liquids that forms the lens can be altered with a voltage. Results are presented of applying this lens in miniature autofocus and zoom cameras, in optical recording and in illumination systems. Keywords: Liquid lens, electrowetting, camera, optical recording, illumination system

1. INTRODUCTION
Various electronic products, such as cameras, optical recording systems and illumination systems, contain variable optical components. In most ca