Spherical aberration compensation actuator and optical pickup system

A spherical aberration compensation actuator (200) and an optical pickup system are provided. The spherical aberration compensation actuator (200) mounts an element for compensating a spherical aberration and operates to a single-axis direction on an optical path using electromagnetic force. The opt...

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Bibliographic Details
Main Author LEE SEONG H.,CHOI IN H.,KIM GIN A.,PARK KWAN W
Format Patent
LanguageEnglish
Published 16.05.2007
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:A spherical aberration compensation actuator (200) and an optical pickup system are provided. The spherical aberration compensation actuator (200) mounts an element for compensating a spherical aberration and operates to a single-axis direction on an optical path using electromagnetic force. The optical pickup system includes a laser diode (321), an object lens (335), a spherical aberration compensation actuator (200), an optical path changer, and an optical detector (327). The spherical aberration compensation actuator (200) is installed on an optical path between the laser diode (321) and the object lens (335) and includes a lens holder having a spherical aberration compensation element for compensating a spherical aberration generated due to light passing through the object lens (335) and operating in an optical-axis direction using electromagnetic force. A spherical aberration compensation servo (329) controls the spherical aberration compensation actuator (200) on the basis of a jitter signal from a jitter signal detector (328) from the optical detector (327).
Bibliography:Application Number: CN200410104153