Electromechanical performance of piezoelectric scanning mirrors for medical endoscopy
The electromechanical performance of piezoelectric scanning mirrors for endoscopy imaging is presented. The devices are supported by a single actuating cantilever to achieve a high fill factor, the ratio of mirror area to the combined mirror and actuator area. The largest fill factor devices (74%) achieved 10° mechanical scan range at ±10 V with a 300 μm long cantilever. The largest angular displacement of 30° mechanical scan range was obtained with a 500 μm long cantilever device with a 63% fill factor driven at 40 V pp. A systematic investigation of device performance (displacement and speed) as a function of fabrication and operational parameters including the stress balance in the cantilever revealed unexpectedly large displacements with lack of inversion at the coercive field. An interpretation of the results is presented based on piezoelectric film domain orientation and clamping with supporting piezoelectric film characterization measurements. © 2012 Elsevier B.V.
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- Nanoscience & Nanotechnology
- 4017 Mechanical engineering
- 4009 Electronics, sensors and digital hardware
- 4008 Electrical engineering
- 0913 Mechanical Engineering
- 0912 Materials Engineering
- 0906 Electrical and Electronic Engineering
Citation
Published In
DOI
ISSN
Publication Date
Volume
Start / End Page
Related Subject Headings
- Nanoscience & Nanotechnology
- 4017 Mechanical engineering
- 4009 Electronics, sensors and digital hardware
- 4008 Electrical engineering
- 0913 Mechanical Engineering
- 0912 Materials Engineering
- 0906 Electrical and Electronic Engineering