Development of compact auto focus actuator for camera phone by applying new electromagnetic configuration

Myung-Jin Chung

doi:10.1117/12.648303

5 December 2005 Development of compact auto focus actuator for camera phone by applying new electromagnetic configuration

Myung-Jin Chung

Author Affiliations +

Proceedings Volume 6048, Optomechatronic Actuators and Manipulation; 60480J (2005) https://doi.org/10.1117/12.648303
Event: Optomechatronic Technologies 2005, 2005, Sapporo, Japan

Abstract

Auto focus actuator, which is used to move a lens module in the mobile phone having a camera module, is developed. Camera module containing auto-focus actuator requires to minimize total size because of application area such as mobile phone, digital camera, and personal digital assistant. There are stepping motor, voice coil motor, and piezoelectric motor as auto-focus actuator. In this paper, voice coil motor having new electromagnetic configuration is proposed. And actuator using proposed voice coil motor is developed by magnetic field analysis using finite element method and magnetic circuit analysis. The size of the developed actuator is reduced to 67.3% compared with actuator using previous electromagnetic configuration. From the performance test, the developed actuator has moving stroke of 0.4mm, hysteresis of 20μm, full stroke current of 100mA, and unit step motion of 10μm.

Citation Download Citation

Myung-Jin Chung "Development of compact auto focus actuator for camera phone by applying new electromagnetic configuration", Proc. SPIE 6048, Optomechatronic Actuators and Manipulation, 60480J (5 December 2005); https://doi.org/10.1117/12.648303

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