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Method for copying gradation recording type read only CD

A recording method and technology for copying methods, which are applied in the manufacture of optical record carriers, optical record carriers, and photoengraving processes of pattern surfaces, etc., can solve the problems of inability to use read-only optical disks for copying, etc., and achieve the effect of solving copying.

Inactive Publication Date: 2005-03-02
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This molded disc manufacturing process is compatible with discs that use traditional pit edge recording methods, but cannot be applied to the duplication of grayscale recording mode read-only discs.

Method used

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  • Method for copying gradation recording type read only CD
  • Method for copying gradation recording type read only CD
  • Method for copying gradation recording type read only CD

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] please see figure 1 : 1 is a disc, 2 is an information recording layer, 3 is a reflective layer, and 4 is a protective layer. The information recording layer 2 is made of a photosensitive material. The information recording layer of the multi-wavelength multi-level read-only optical disc has been fixed by strong electricity or other methods during duplication, and will not change due to light.

[0026] Figure 2-4 Among them, 5 is the master disc used as a mask, 6 is the disc to be copied composed of the photosensitive layer and the disc base, 7 is the auxiliary mirror (convex mirror, the mirror face is downward), 8, 9 are 5, 6 are in 10 The reflection spot formed on the top, 10 is the main reflector (concave mirror, the mirror surface is upward). 12 is the image formed by 11 on the disc to be copied. The light emitted by the exposure light source is irradiated downward from above the mask to form a projection 11 on the master disc. Since the master disc is a light...

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Abstract

The invention is the replicating method for grey scale recorded CDROM, it belongs to high density digital light storing field, and its characters lie in: the sensitizer which the different response to light of different wave length is pasted on the pressed disc base equably, uses the mother disc which is manufactured in advance as covering film, exposes with 1:1 exposal method; then fixes the sensitizer layer on the exposed disc and becomes information recording layer; finally the reflection layer and protection layer are pasted on the information recording layer, and finishes the replicating. The 1:1 exposal method may be reflective pattern on approximation pattern.

Description

technical field [0001] The invention relates to a method for duplicating a read-only optical disc in a grayscale recording mode, which belongs to the fields of high-density digital optical storage technology and micro-processing technology. Background technique [0002] Optical disc technology plays a huge role in the field of information storage. The method of recording information on the read-only optical disc currently used in the market is to use the alternate change of pits and lands on the disc track, the jump from pit to land or from land to pit as signal 1, and the flat part in the pit and on the land as signal 1. Signal 0. When the light spot focused by the optical head of the optical disc drive sweeps the track, due to the diffraction effect, the signal returned to the optical head detector will change with the pit point of the track: the signal read in the pit is weak, and the signal read on the shore Strong, so that the readout of the disc information can be re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/00G11B7/26
Inventor 徐端颐张启程蒋培军雷志军
Owner TSINGHUA UNIV
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