Electromagnetic actuator of optical pickup head

An electromagnetic actuator is provided, including an object lens holder hanged by a set of wires forming suspended object. A focus coil set is fixed to object lens holder and placed surrounding focus and track shared magnet set. The focus coil located between object lens holder and focus and track...

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Bibliographic Details
Main Authors CHANG PING-JU, CHANG TSUNG-KAI
Format Patent
LanguageEnglish
Published 16.10.2012
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:An electromagnetic actuator is provided, including an object lens holder hanged by a set of wires forming suspended object. A focus coil set is fixed to object lens holder and placed surrounding focus and track shared magnet set. The focus coil located between object lens holder and focus and track shared magnet set is within magnetic field of focus and track shared magnet set. The focus coil located between tilt magnet set and magnetic field of focus and track shared magnet set is within the effective field of tilt magnet set and focus and track shared magnet set due to shielding effect of the yoke protruding plates. When a current runs through focus coil, a magnetic force in the focus direction is induced simultaneously within the range of tilt magnet set and focus and track shared magnet set so that object lens holder can focus.
Bibliography:Application Number: US201113225482