A spiral motion piezoelectric micromotor for autofocus and auto zoom in a medical endoscope

被引：26

作者：

Chen, Xi ^{[1
]}

Chen, Zhijiang ^{[2
]}

Li, Xiaotian ^{[3
]}

Shan, Liang ^{[1
]}

Sun, Wanchen ^{[1
]}

Wang, Xiguang ^{[1
]}

Xie, Tianyu ^{[1
]}

Dong, Shuxiang ^{[1
]}

机构：

[1] Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China

[2] China Acad Engn Phys, Inst Mat, Mianyang 621908, Peoples R China

[3] Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 05期

基金：

中国国家自然科学基金;

关键词：

ULTRASONIC MOTORS; CAPSULE ENDOSCOPY; DEVICE;

D O I：

10.1063/1.4941395

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report a hollow type piezoelectric micromotor made of a PZT ceramic/metal composite cylinder with sizes of only 3.6mm in diameter and 3.0mm in length aiming at medical endoscope application. The hollow piezoelectric stator of the micromotor, acting as a nut, can excite E-02-mode traveling wave along its circumferential direction, and a hollow rotor with a fine lens inside, acting as a screw, is driven to produce a spiral motion along its axis direction inside the hollow stator via the traveling wave. The features of the developed micromotors are its hollow, fine structure and submicrometer step resolution, ensuring that the optical path passes in a narrow and limited space and that the optical focal length is tuned precisely inside the endoscope, which is meaningful in medical diagnosis. (C) 2016 AIP Publishing LLC.

引用

页数：5

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