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Optical recording and playing device

A playback device, optical recording technology, applied in the direction of data recording, optical recording/reproduction, recording information storage, etc.

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

AI Technical Summary

Problems solved by technology

[0019] However, the above-mentioned various forms of optical recording and playback methods all have a common condition, that is, the focal depth of the light collected by the condenser lens must be within the thickness of the recording layer of the optical disc, so that the signal can be accurately played and recorded.

Method used

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  • Optical recording and playing device
  • Optical recording and playing device
  • Optical recording and playing device

Examples

Experimental program
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Embodiment Construction

[0036] Figure 4 and Figure 5 Shown is a schematic structural diagram of an optical recording and playback method according to a specific embodiment of the present invention, wherein, Figure 4 for oblique view, Figure 5 A sectional view of the main part.

[0037] As shown in the figure, the optical recording and playback device of the present invention includes: a sending / receiving part (not shown) for recording or playing information with irradiated light and incident light; The rotating arm 10 provided; the driving part 20 that provides the rotating driving force to the rotating arm 10; the sliding contact 30 located at the end part of the rotating arm 10; The light irradiated by the / light receiving unit is focused and incident on the recording layer 3 of the optical disc D described above.

[0038] In addition, the optical recording and playback device of the present invention further includes: a focus measuring device 40 and a height adjusting device 50 of the above...

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Abstract

The optical recording and playing device includes the following parts: light transmitting and collecting part with incident light to record and play back information; rotating arm set on the main body to make CD rotate in forward and inverse directions; driving part to provide the rotating arm with rotation driving force; sliding contact located in the tip of the rotating arm; converging lens on the sliding contact to converge light to the record layer of CD. The optical recording and playing device includes also focus testing unit set on the sliding contact to apply test signal to the CD record layer and detect the CD record layer reflected test signal to determine the depth of the focus of the converging lens; and height regulating unit set on the rotating arm to regulate the distance between the sliding contact and the CD surface based on the signal from the focus testing unit. The optical recording and playing device makes the focus of the converging lens accord with the CD record layer.

Description

(1) Technical field [0001] The present invention relates to an optical recording and playing device, and more specifically relates to a tool for adjusting the height of a rotating arm on the optical recording and playing device, so that the focal point of the light collected by the light-condensing lens of the sliding contact coincides accurately with the recording layer of the optical disc . (2) Background technology [0002] Today, 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 existing optical recording and playback methods. [0003] For optical recording media or magneto-optical recording media, high-density recording can only be achieved when the bit size (or recording characteristics) has a miniaturized specification and the track pitch becomes smaller. However, due to the layered structure of the recording medium that includes the protective layer, the rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/00G11B7/09
Inventor 李洙京金进镛
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI