Design of a slim-type optical pick-up actuator using PMN-PT bimorphs

被引：12
|
作者：
Ko, Byeongsik [1 ]
Jung, Jung-Sub [1 ]
Lee, Seung-Yop [1 ]
机构：
[1] Sogang Univ, Dept Mech Engn, Seoul 121742, South Korea
来源：
SMART MATERIALS & STRUCTURES | 2006年 / 15卷 / 06期
关键词：
D O I：
10.1088/0964-1726/15/6/047
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
In this paper, a new optical pick-up actuator is proposed using PMN-PT (lead magnesium niobate-lead titanate) bimorphs for slim and small form factor optical disk drives. We suggest a novel structure enabling both tracking and focusing motions by changing the moving directions of the two parallel bimorphs. A cymbal-type flextensional structure is used as a displacement amplifier in order to meet the stroke requirement for optical pick-up actuators. We have performed the theoretical analyses for the bimorph actuator and displacement amplifier to predict the resultant force and displacement. The proposed actuator based on PMN-PT bimorphs and displacement amplifier has been manufactured, and the experimental results are compared to the analytical predictions. Experimental results agree well with the analytical predictions, showing that the cymbal structure amplifies the displacement twice and the focusing stroke is 52 mu m at 10 V.
引用
收藏
页码：1912 / 1918
页数：7
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