Development of an Electromagnetically Driven Optical MEMS Mirror with Functions of Z-Axis Vibration and X, Y Bi-Directional Tilting, and an Application to Low Coherent Optical Interferometer
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This paper presents development of an optical MEMS mirror device and an application to low coherence interferometry. This device can vibrate ±0.9μm along Z-axis under resonant frequency (5.24Vpp, 28.48kHz) for lock-in detection, and can tilt to X, Y bi-direction (Optical angle X:±10.6°/±10mA, Y:±5.2°/±10mA) for 2-D scanning and optical axis alignment by electromagnetic force between planar coils and a permanent magnet. In addition, developed MEMS mirror is embedded to a time-domain low coherent interferometer with a super luminescent diode (λc: 832nm, Δλ: 14.7nm) for optical axis alignment and lock-in detection, and the thickness and refractive index of a glass plate have been evaluated with low noise.
- The Journal of the Institute of Electrical Engineers of Japan
The Journal of the Institute of Electrical Engineers of Japan 128(3), 70-74, 2008-03-01
The Institute of Electrical Engineers of Japan