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High density optical recording and playing method and its device

A playback method and playback device technology, applied in the direction of optical recording/reproduction, magnetic recording, data recording, etc., can solve the problem of space limitation of the protective layer, and achieve the effect of protecting the surface of the optical disc

Inactive Publication Date: 2004-09-29
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] Therefore, in the near-field optical recording and playback method, although the protective layer plays the role of strengthening the optical disc from the influence of heat, the space where the protective layer can be formed is limited, which has always been a problem.

Method used

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  • High density optical recording and playing method and its device
  • High density optical recording and playing method and its device
  • High density optical recording and playing method and its device

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Embodiment Construction

[0055] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0056] Figure 3 ~ Figure 5 The composition of the optical recording and playback method of the present invention is generally shown, image 3 Indicates the composition of the first embodiment, Figure 4 shows the composition of the second embodiment, Figure 5 The configuration of the third embodiment is shown.

[0057] As shown in the figure, the optical recording and playback method of the present invention includes:

[0058] For the central recording layer 12 of disc thickness, it is formed towards the contact surface of light-collecting lens 20, and the step of forming the contact surface of protective layer 13 on the disc recording layer 12; by above-mentioned light-collecting lens 20, on the contact surface A step of performing recording or playback by injecting light irradiated from a light sending / receiving unit (not shown) onto the recording laye...

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Abstract

The present invention relates to high density optical recording and playing method and device. Emitted light is made to pass through converging lens before irradiating the rotating CD to record or play information. The optical recording and playing method includes the following steps: forming the record layer in the contact surface to the converging lens of the center of the CD and forming protective layer on the record layer to form the contact surface record type CD configuration; and making the light through the converging lens irradiate the record layer of the contact surface record type CD to record or play back. The present invention can record or play back information on high density CD and protect the surface of CD effectively.

Description

(1) Technical field [0001] The present invention relates to an optical recording and playback method and device, that is, a high-density optical recording and playback method and device that deforms the layered structure of the recording medium-optical disc for high-density optical recording and playback, and is suitable for this structure. (2) Background technology [0002] In view of the trend of large-capacity information, it is necessary to develop a new optical recording and playback method that can overcome the limitations of the existing optical recording and playback method. [0003] For optical recording media or magneto-optical recording media, in order to realize the miniaturization of the bit (or recording feature) specification, the width of the optical track needs to be reduced in order to be able to hold high-density recording capacity. However, due to the layered structure of the recording medium of the protective layer, the recording layer, and the reflectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/00G11B11/10G11B11/24
Inventor 金洙京金英植
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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