Red light high-density optical disk

A high-density, optical disc technology, applied in optical record carriers, tracks/pits, information arrangement, etc., can solve the difficulty of forming a large-scale market for blue optical storage discs, increase the cost and process difficulty of master disc and disc manufacturing equipment, Problems such as rising player costs

Inactive Publication Date: 2007-08-29
上海新汇时代光盘技术有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the use of blue light and high NA lenses not only greatly increases the cost of the player, but also greatly increases the cost of the master disc and disc manufacturing equipment and the difficulty of the process
Therefore, it is difficult for these two Blu-ray storage discs to form a large-scale market so far.

Method used

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  • Red light high-density optical disk
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  • Red light high-density optical disk

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Embodiment Construction

[0018] See Figure 1. Fig. 1 is a comparison of the atomic force micrographs of the disk base of the embodiment of the present invention and the DVD disk base. Among them, 1 disc base, 2 information pits.

[0019] The design method of disc and master disc of the present invention is as follows:

[0020] 1. Disc and master disc design: carry out more precise design on each information layer of disc and master disc, comprehensively adjust and balance "program length", "track spacing", "linear speed", "replication shrinkage rate" According to the relationship with the "physical radius" of each area, the relevant parameters are correctly calculated and determined.

[0021] Disc calculation:

[0022] Track pitch · (96 / 11 · shortest length of information pit) · program length = storage area area · data rate

[0023] Program length = number of program segments

[0024] Data rate = number of sectors / second

[0025] Storage area circular area = π (R 2 -r 2 ), R and r are the out...

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Abstract

This invention relates to a red light high density disk characterizing that the space between information channels is 0.54-0.68mum, the shortest length and the shortest distance of the information pits is 0.32-0.38mum, the diameter is 120mm, the maximum outer diameter of the data region is 117.0mm wider than that of the current 116.0mm, 635-650nm red light and an optical head with 0.6-0.7 lens numerical aperture are used to read data, when the distance between information channels is 0.54-0.59mum, the shortest length and the shortest distance between the information pits is 0.32-0.35mum, the storage volume of a single-side / single layer of the disk can reach to 7-8GB and 14-16GB for single side / double layer, which increases 5.46-7.46GB to the current DVD-9 disks.

Description

technical field [0001] The invention belongs to the development of a new generation of red-ray high-density optical disc and its master disc. By expanding the outer diameter of the data area, reducing the distance between information tracks and the shortest length and distance between information pits, the storage density of the optical disc is increased, and the storage capacity of a single-sided single-layer optical disc with a diameter of 120mm reaches 5.5-8GB. The storage capacity of double-layer optical discs reaches 11-16GB, which can be applied to high-definition red-ray optical disc storage systems. Background technique [0002] CDs and DVDs have become widely used commercial products. CD uses 780nm (infrared) laser, objective lens numerical aperture (NA) is 0.45, track pitch is 1.6μm, 3T pit length is 0.8μm, storage capacity is 0.65GB; DVD uses 635-650nm (red) laser, NA is 0.6 , the track pitch is 0.74μm, the pit length of single-sided single-layer disc is 0.4μm, ...

Claims

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Application Information

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IPC IPC(8): G11B7/007G11B7/24G11B7/2407
Inventor 阮昊李伟权侯立松
Owner 上海新汇时代光盘技术有限公司
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