Method and system for high speed optical scanning
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United States of America Patent
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Issued Date -
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app pub date -
Jun 2, 2006
filing date -
Jun 13, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Systems and methods for optical scanning, in one configuration, including a torsional dither mechanism having a torsion rod formed of integral construction machined from a single metal piece, magnet and mirror mount attached to the free end of the torsion rod, and electromagnetic drive. The drive comprises a magnet mounted to the magnet mount and a drive coil. Torque is generated on the dither arm as oscillating current is applied to the coil, to preferably drive the torsion rod at a high oscillation speed on the order of 5 KHz. Acoustic noise control is provided by using a combination of elastomeric isolation mounts, a thick wall enclosure and lid for the dither, an electrically resonant dither drive, and mechanically resonant drive control using back EMF from a moving magnet to set the frequency of oscillation of the dither drive.
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