Read-only disc scanning projective duplicating method and apparatus thereof

A technology of projection copying and optical discs, which is applied in the direction of optical re-recording, etc., can solve the problems of gray-scale multi-level read-only disc copying, high-density disc copying difficulties, etc., to increase the capacity of a single disc, long life, and reduce production costs Effect

Inactive Publication Date: 2005-07-06
TSINGHUA UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the difficulty in duplicating high-density optical discs in the prior art and the duplication problems of new gray-scale multi-level read-only optical discs, the present invention proposes a scanning projection duplication method for read-only optical discs and its implementation device, which is not only suitable for traditional pit edge recording types Duplication of CD-ROMs, also suitable for duplication of new gray-scale multi-level CD-ROMs

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  • Read-only disc scanning projective duplicating method and apparatus thereof
  • Read-only disc scanning projective duplicating method and apparatus thereof
  • Read-only disc scanning projective duplicating method and apparatus thereof

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Embodiment 1

[0033] Embodiment 1---Replicating a read-only optical disc of pit edge recording type with a scanning projection duplicating device, with a diameter of 120 mm.

[0034] combine figure 1 , Figure 3a , Figure 3b , Figure 5 and Figure 6 Be explained. Light source 1 adopts 405nm ultraviolet light. The base of the optical disc to be copied is made of organic plastic after pressing, with a thickness of 1.2mm (CD base) or 0.6mm (DVD base). The surface of the base is first coated with a layer of 50-70nm aluminum film, A layer of UV photoresist was spin-coated on the film. The master disc 3 is provided with equal-width through holes of different lengths along the circumference as information record marks. The line width L of the CD-type master disk is 0.8 μm, the track pitch d is 1.6 μm, the line width L of the DVD-type master disk is 0.4 μm, and the track pitch d is 0.74 μm. The illumination system forms a uniform illumination spot with a diameter of Φ3mm at the master dis...

Embodiment 2

[0035] Embodiment 2---Using a scanning projection copying device to copy a gray-scale read-only optical disc with a diameter of 120mm.

[0036] combine figure 1 , Figure 4 , Figure 5 and Figure 6 Be explained. The light source 1 is a high-pressure mercury lamp. The disc base of the optical disc to be copied is made of organic plastic after pressing, with a thickness of 1.2mm (CD disc base) or 0.6mm (DVD disc base), on which a layer of photometric recording material silver bromide photosensitive emulsion is spin-coated as a photosensitive layer. The master disc 3 is composed of a cured layer, an information recording layer and a protective layer. The information recording layer of the master disk is composed of a photochromic material diarylene with electric lock characteristics. Each recording point on the information recording layer is obtained by applying a 3.2V locking voltage for 3 minutes after being exposed to light of different intensities. Each recording poin...

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Abstract

The invention discloses a method and device for scanning and projecting copying of a read-only optical disc, belonging to the technical field of optical disc copying. In order to solve the difficulty in duplicating high-density optical discs in the prior art and the duplication of novel gray-scale multi-level read-only optical discs, the present invention proposes a method and device for scanning projection duplication of read-only optical discs. The main steps of the method are: lighting system An illumination spot is formed on the master disc, and the part of the master disc in the illuminated area is image-exposed on the resist, photochromic material or photosensitive agent with electric locking properties on the surface of the disc to be replicated through a 1:1 projection imaging system. Through the synchronous rotation and linear feed motion of the master disc and the read-only disc to be copied, the scanning projection copying of the entire disc is completed. The invention can realize lossless duplication, improve the service life of the master disc, and select a large numerical aperture to meet the requirement of high-density disc duplication. This technology is not only suitable for the duplication of traditional pit edge recording type read-only optical discs, but also suitable for the duplication of new gray scale multi-level read-only optical discs.

Description

technical field [0001] The invention relates to a read-only optical disc scanning projection duplication method and a device for realizing it, and belongs to the technical field of optical disc duplication. Scanning and projection copying of CD-ROM is a new method of CD-ROM copying, which is obviously different from the traditional molding and injection-type copying method, and has a wider scope of application. It is suitable for copying the new type of gray-scale multi-level CD-ROM. Background technique [0002] The traditional read-only disc copying process is to record the data information on the glass master disc by photolithography first, then make a stamper, use the method of injection molding to copy the information on the plastic disc, and coat it with a metal film and a protective film. Make a disc. This is also a widely used production method of CD-ROM. This method has high requirements on the production process of the master disc, and the corresponding producti...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G11B7/28
Inventor齐国生沈全洪佘鹏徐端颐
OwnerTSINGHUA UNIV