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ABSTRACT
This paper presents the design, fabrication and measurement
results of a dual-axis electromagnetic scanning micromirror
utilizing radial magnetic field. The scanner is comprised of a
gimbaled single-crystal-silicon micromirror with a single
turn electroplated metal coil, assembled passively above a
concentric permanent magnet assembly. Proposed scanner
utilizes the radial magnetic field rather than using the
magnetic field oriented 45° to the horizontal and vertical
scan axes to achieve a biaxial magnetic actuation[1,2].
Forced actuation of the gimbal and resonant actuation of the
micromirror provide slow vertical scan and fast horizontal
scan respectively. A dual-axis scanner with maximum scan
angle of 16.1°, mirror size of 1.5mm in diameter, and resonant
frequency of 19.7kHz is reported.

利用放射式電場來致動的電磁式微掃描面鏡,使用SOI晶圓做為面鏡結構並配電鑄銅技術來做為磁場感應。當電流通過面鏡時,由於可通過兩組訊號,因此可以達到雙軸致動方式。


Reference:
Chang-Hyeon Ji, Si-Hong Ahn, Ki-Chang Song, Hyoung-Kil Yoon, Moongoo Choi, Sang-Cheon Kim, and Jong-Uk Bu, "DUAL-AXIS ELECTROMAGNETIC SCANNING MICROMIRRORUSING RADIAL MAGNETIC FIELD", MEMS 2006, Istabui, Turkey, Jan. 2006.


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