Projects per year
The development and characterisation of a piezoelectric actuated high-frequency MEMS scanning mirror with on-chip frequency tuning capability is reported. The resonant scanner operates at frequencies in excess of 140 kHz, generating scan angles of 10 ∘ and 6 ∘ for two orthogonal movement modes with 40 V actuation. On-chip frequency tuning is achieved through electrothermal actuators fabricated adjacent to the mirror main suspension. The electrothermal actuators produce a global and local temperature increase which changes the suspension stiffness and therefore the resonant frequency. A resonance frequency tuning range of up to 5.5 kHz is achieved, with tuning dominant on only one of the two orthogonal scan movement modes. This opens the possibility for precise tuning of a 2D Lissajous scan pattern using a single resonant MEMS scanner with dual orthogonal resonant modes producing full frame update rates up to 20 kHz while retaining the full angular range of both resonant movement modes.
|Number of pages||7|
|Journal||Journal of Microelectromechanical Systems|
|Early online date||29 Aug 2022|
|Publication status||Published - Dec 2022|
- scanning mirror
- frequency tuning
- lissajous scanning
- resonant frequency
- micromechanical devices
- frequency measurement
- temperature measurement
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- 2 Finished
Miniaturised 3D-printed biomedical imaging system using optical MEMS - RAE Fellowships (GCRF)
Royal Academy of Engineering RAE
1/10/16 → 30/09/21
Project: Research Fellowship
Data for: "On-chip frequency tuning of fast resonant MEMS scanner"
Bauer, R. (Creator), JANIN, P. (Contributor) & Uttamchandani, D. (Supervisor), University of Strathclyde, 13 Jun 2022
- 1 Citations
- 1 Paper
22.3 kHz update rate Lissajous scanning using a single double resonant MEMS scannerChristopher, J., Janin, P., Uttamchandani, D. & Bauer, R., 15 Sep 2022, (E-pub ahead of print). 2 p.
Research output: Contribution to conference › Paper › peer-reviewOpen AccessFile