A water-immersible two-axis scanning mirror microsystem for ultrasound and photoacoustic microscopic imaging applications

Chih-Hsien Huang; Junjie Yao; Lihong V. Wang; Jun Zou

doi:10.1117/12.2003087

13 March 2013 A water-immersible two-axis scanning mirror microsystem for ultrasound and photoacoustic microscopic imaging applications

Chih-Hsien Huang, Junjie Yao, Lihong V. Wang, Jun Zou

Author Affiliations +

Proceedings Volume 8616, MOEMS and Miniaturized Systems XII; 861607 (2013) https://doi.org/10.1117/12.2003087
Event: SPIE MOEMS-MEMS, 2013, San Francisco, California, United States

Abstract

For both ultrasound and photoacoustic microscopic imaging, a fast scanning ability is required, whereas the liquid environment for acoustic propagation limits the usage of traditional MEMS scanning mirrors. In this paper, a new waterimmersible scanning mirror microsystem has been designed, fabricated and tested. To achieve reliable underwater scanning, flexible polymer torsion hinges fabricated by laser micromachining were used to support the reflective silicon mirror plate. Two efficient electromagnetic microactuators consisting of compact RF choke inductors and high-strength neodymium magnet disc were constructed to drive the silicon mirror plate around a fast axis and a slow axis, respectively. The performance of the water-immersible scanning mirror microsystem in both air and water were tested using the laser tracing method. For the fast axis, the resonance frequency reached 224 Hz in air and 164 Hz in water, respectively. The scanning angles in air and water under ±10 V AC driving (at the resonance frequencies) were ±13.6° and ±10°. The scanning angles in both air and water under ±16 V DC driving were ±12°. For the slow axis, the resonance frequency reached 55 Hz in air and 38 Hz in water, respectively. The scanning angles in air and water under ±10 V AC driving (at the resonance frequencies) were ±8.5° and ±6°. The scanning angles in both air and water under ±10 V DC driving were ± 6.5°. The feasibility of using such a water-immersible scanning mirror microsystem for scanning ultrasound microscopic (SAM) imaging has been demonstrated with a 25-MHz ultrasound pulse/echo system and a target consisting of three optical fibers.

Citation Download Citation

Chih-Hsien Huang, Junjie Yao, Lihong V. Wang, and Jun Zou "A water-immersible two-axis scanning mirror microsystem for ultrasound and photoacoustic microscopic imaging applications", Proc. SPIE 8616, MOEMS and Miniaturized Systems XII, 861607 (13 March 2013); https://doi.org/10.1117/12.2003087

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