Development of auto focus actuator for camera phone by applying piezoelectric single crystal

Myung-Jin Chung; Yang-Hee Yee; Dong-Hyuk Cha

doi:10.1117/12.754319

10 October 2007 Development of auto focus actuator for camera phone by applying piezoelectric single crystal

Myung-Jin Chung, Yang-Hee Yee, Dong-Hyuk Cha

Proceedings Volume 6715, Optomechatronic Actuators and Manipulation III; 671507 (2007) https://doi.org/10.1117/12.754319
Event: International Symposium on Optomechatronic Technologies, 2007, Lausanne, Switzerland

Abstract

In this work, compact auto focus actuator moving lens module in the camera phone is developed by applying piezoelectric single crystal. This actuator is reduced in the size by applying the piezoelectric single crystal. The size of developed actuator (12*9.2*5.6 mm³) is reduced to 60.4% compared with the actuator using general voice coil motor. From the performance test, the developed actuator has moving stroke of 0.16mm, full stroke hysteresis of 5μm, settling time of 150msec, maximum overshoot of 7%, and unit step motion of 1μm. The manufacturing method for proposed actuator can be applicable to the nano-millimeter resolution and sub-millimeter stroke positioning system using for precision measuring microscope.

Citation Download Citation

Myung-Jin Chung, Yang-Hee Yee, and Dong-Hyuk Cha "Development of auto focus actuator for camera phone by applying piezoelectric single crystal", Proc. SPIE 6715, Optomechatronic Actuators and Manipulation III, 671507 (10 October 2007); https://doi.org/10.1117/12.754319

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