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Optical storage system

A storage system and optical technology, applied in the field of optical storage systems with read heads, can solve problems such as unpredictable phase changes of reference beams, distortion of signal beams, and reduced reliability of reproduced signals, etc.

Inactive Publication Date: 2007-01-24
DAEWOO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So, this will cause an unpredictable phase change of the reference beam
[0006] Therefore, in conventional optical storage systems, there is a risk of a sudden and large drop in the reliability of the reproduced signal due to signal beam quality degradation, signal beam distortion, and phase changes caused by foreign substances adhering to the optical lens. caused by

Method used

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  • Optical storage system
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Embodiment Construction

[0016] Detailed description of the preferred embodiment

[0017] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which Figure 1 to Figure 5 The same components will be denoted by the same reference numerals.

[0018] see figure 1 , figure 1 An optical storage system using compact discs and / or digital versatile discs as storage media according to the first preferred embodiment of the present invention is shown. The optical storage system includes a read head 10 for reproducing information stored in an optical disc 20 in the form of bit tracks. The pickup 10 introduces a beam of light onto the bit track of the optical disc 20 through an objective lens (hereinafter referred to as a reproduction beam). The reproduced beam is reflected by the optical disc 20 to form a reflected beam (hereinafter referred to as a signal beam), and the reflected beam enters the pickup head 10 through the obje...

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Abstract

An optical storage system of the present invention includes an optical storage medium and a pick-up head for reproducing information from the optical storage medium. The pick-up head has an optical lens and a lens protecting device for preventing a foreign material from adhering to the optical lens. The lens protecting device opens the optical lens of the pick-up head when the pick-up head reproduces the information from the optical recording medium.

Description

field of invention [0001] The present invention relates to an optical storage system, such as a CD-ROM system, a DVD-ROM system, and a holographic ROM system; in particular, it relates to an optical storage system with a read head, which can isolate its optical lens from contact with external substances , to improve the reliability of signal reproduction in optical storage systems. Background of the invention [0002] In general, a conventional optical storage system, such as a CD-ROM system, DVD-ROM system or holographic ROM system, includes an optical drive unit and a storage medium. A storage medium generally used in a CD-ROM system or a DVD-ROM system is a compact disc or a digital versatile disc, which stores information in the form of bit tracks formed on the surface of the disc. Whereas, the storage medium used in the holographic ROM system is a holographic optical disc, which stores information in the form of hologram tracks formed on the optical disc. [0003] Fur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/12G11B7/0065G11B7/121G11B33/14
CPCG11B7/1201G11B33/1446G11B7/121G11B7/0065
Inventor 朴柱研
Owner DAEWOO ELECTRONICS CO LTD