Highly sensitive actuator for optical reading head

An optical pickup and actuator technology, which is applied to optical recording heads, recording/reproducing by optical methods, configuration/installation of heads, etc., can solve the problems of increased distance, cost, and increased weight of the optical objective lens group 12.

Inactive Publication Date: 2006-02-08
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this increased number of coils not only increases the weight of the tracking coil, but also increases the weight of the optical objective lens group 12, and increases the distance between the optical objective lens group 12 and the permanent magnet (to accommodate more coils), so that the focusing coil and the permanent magnet Increased distance of permanent magnets
This increased distance relatively reduces the effective magnetic force of the permanent magnet, so that the focusing coil must use a larger current or more coils to achieve fast focusing, which requires additional resources.

Method used

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  • Highly sensitive actuator for optical reading head
  • Highly sensitive actuator for optical reading head
  • Highly sensitive actuator for optical reading head

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Embodiment Construction

[0029] Please refer to Figure 7 , Figure 7 An optical pick-up head 70 according to a preferred embodiment of the present invention includes an optical lens set 72 , an actuator 74 , a laser LED 76 , a light sensor 78 , a set of support wires 80 and a processing circuit 82 . The laser light is emitted by the laser light-emitting diode 76, passes through the optical objective lens group 72, passes through the optical path to the optical disc, and then passes through the return optical path optical sensor 78 to receive the laser light reflected by the optical disc, and the processing circuit 82 judges the optical objective according to the received laser light. Whether the group 72 is accurately focused or tracked at the specified position. If the processing circuit 82 judges that the optical objective lens group 72 is not accurately focused or tracked at the specified position by the received laser light, the processing circuit 82 drives the actuator 74 to fine-tune the optic...

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Abstract

The invention provides a high-fidelity motivator of optical reading head, which changes the magnetic arrangement of first permanent magnet and second permanent magnet of the high-fidelity motivator to provide the diverse magnetic direction of the out part and the center part of the motivator repeating coil so as to generate the electromagnetic induction force to achieve the high-fidelity.

Description

technical field [0001] The invention provides a high-sensitivity actuator for an optical pickup head, in particular a method of changing the arrangement of permanent magnet sectors to reduce the current and the number of coils required for the tracking coil of the actuator to drive the optical objective lens to track , so as to achieve an actuator that improves the sensitivity and energy efficiency of the optical pickup head. Background technique [0002] In the modern information society, optical discs, which are small in size, light in weight, high in storage density and low in cost, have become one of the most popular non-volatile storage media. In order to access the high-density optical data on the optical disc more quickly and correctly, how to improve the performance of the optical disc access device (such as optical drive and optical disc player) to make the operation of the optical disc access device more efficient, that is, Become one of the key points of research...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/09G11B7/135G11B7/1374
Inventor 张凌晨
Owner LITE ON IT
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