Varifocal MEMS mirrors for high-speed axial focus scanning: a review

J Pribošek, M Bainschab, T Sasaki - Microsystems & Nanoengineering, 2023 - nature.com
Recent advances brought the performance of MEMS-based varifocal mirrors to levels
comparable to conventional ultra-high-speed focusing devices. Varifocal mirrors are …

Progress of MEMS scanning micromirrors for optical bio-imaging

LY Lin, EG Keeler - Micromachines, 2015 - mdpi.com
Microelectromechanical systems (MEMS) have an unmatched ability to incorporate
numerous functionalities into ultra-compact devices, and due to their versatility and …

Electrothermally actuated tip-tilt-piston micromirror with integrated varifocal capability

J Morrison, M Imboden, TDC Little, DJ Bishop - Optics express, 2015 - opg.optica.org
MEMS micromirrors have proven to be very important optical devices with applications
ranging from steerable mirrors for switches and cross-connects to spatial light modulators for …

Varifocal micromirror integrated with comb-drive scanner on silicon-on-insulator wafer

T Sasaki, K Hane - Journal of microelectromechanical systems, 2012 - ieeexplore.ieee.org
We present a varifocal scanning micromirror fabricated from a silicon-on-insulator wafer. The
varifocal scanning micromirror consists of a varifocal mirror with a rotational scanning …

Design analysis and simulation of a digital RF MEMS varactor with high capacitive ratio

A Sharaf, A Nasr, AM Elshurafa, M Serry - Microsystem Technologies, 2022 - Springer
This work presents a variable RF MEMS capacitor based on five cantilever shunt switches
for the first time. Conceptually, the proposed varactor design comprises five identical …

Deformable mirror driven by piezoelectric thin film based on multi-electrode array

X Guo, H Yin, M Li, I Kanno, D Wang, S Jiang… - Sensors and Actuators A …, 2024 - Elsevier
This paper designs and fabricates a MEMS deformable mirror with 61 electrodes driven by
piezoelectric thin films (PZT) to achieve high voltage. This approach effectively corrects …

Confocal laser displacement sensor using a micro-machined varifocal mirror

K Nakazawa, T Sasaki, H Furuta, J Kamiya, H Sasaki… - Applied Optics, 2017 - opg.optica.org
A confocal laser displacement sensor using a micro-machined varifocal mirror is reported.
The focal length modulation is a key function of the confocal sensor. The mechanism of the …

Design, simulation, and characterization of a bimorph varifocal micromirror and its application in an optical imaging system

L Li, R Li, W Lubeigt… - Journal of …, 2012 - ieeexplore.ieee.org
A 1.2-mm-diameter gold-silicon bimorph varifocal micromirror (VFM) has been designed and
investigated for imaging applications. Several prototypes have been fabricated in a 10-μm …

Zero-balance method for evaluation of sealed cavity pressure down to single digit Pa using thin silicon diaphragm

MS Al Farisi, H Hirano, S Tanaka - Journal of …, 2020 - ieeexplore.ieee.org
The sealed cavity pressure of a micro-package often becomes the determining factor of the
performance of an encapsulated micro-electro mechanical system (MEMS). In this study, a …

Low-stress epitaxial polysilicon process for micromirror devices

Y Suzuki, K Totsu, H Watanabe… - IEEJ Transactions on …, 2013 - jstage.jst.go.jp
This paper reports key process technologies for the application of epitaxial polysilicon (epi-
poly-Si) to scanning micromirrors, including low-stress epi-poly-Si deposition, the chemical …