Design of an autofocus lens for VGA ¼-inch CCD and CMOS sensors

Lisa Saurei; Gilles Mathieu; Bruno Berge

doi:10.1117/12.512960

18 February 2004 Design of an autofocus lens for VGA ¼-in. CCD and CMOS sensors

Lisa Saurei, Gilles Mathieu, Bruno Berge

Proceedings Volume 5249, Optical Design and Engineering; (2004) https://doi.org/10.1117/12.512960
Event: Optical Systems Design, 2003, St. Etienne, France

Abstract

We present the design of a lens for CCD or CMOS sensors using a new generation of lenses with electrically controlled focal length. These new elements made out of liquids (a drop of oil in water) work according to the principle of electro-wetting: the spreading of a drop of water on an electrically insulating surface can be modified by creating an accumulation of charges at the base of the drop. The densities of the two liquid phases are matched in order to keep the phases in place whatever the position of the lens. This new lens can be used in small devices to achieve auto-focus camera modules. There are several ways to integrate our adaptive optic in a fixed camera module lens, classically made up of plastic lenses. We will discuss three different configurations for a VGA system with 4 mm focal length, f/3 aperture, 60° field. The optical resolution is excellent, for object distance going from 50 mm to infinity.

Citation Download Citation

Lisa Saurei, Gilles Mathieu, and Bruno Berge "Design of an autofocus lens for VGA ¼-in. CCD and CMOS sensors", Proc. SPIE 5249, Optical Design and Engineering, (18 February 2004); https://doi.org/10.1117/12.512960

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available