JPH11144437A - Optical-disk repair device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical-disk repair device capable of simply repairing a flaw formed to the disk surface of an optical disk rapidly without deteriorating workability and work environment regarding the optical-disk repair device repairing the flaw of the substrate surface of the optical disk, on which information is recorded or reproduced by light. SOLUTION: The optical-disk repair device has a holding means fixing and holding an optical disk 1, a smoothing contact means, which has a smooth surface brought into contact with a disk surface on the reading surface side of the optical disk 1 held to the holding means and in which a surface is coated with a resin having water repellency or coated with fats and oils having water repellency, a heating means heating the smooth surface of the smoothing contact means and a pushing means pushing the smooth surface of the heated smoothing contact means against the optical disk 1, and the heated smooth surface of the smoothing contact means is pushed against the optical disk by the pushing means and the flaw of the surface of the optical disk 1 is repaired.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk repairing apparatus for repairing a scratch on a substrate surface of an optical disk for recording or reproducing information by light.

[0002]

2. Description of the Related Art In recent years, compact disks (CDs) and laser disks (L
D) CD-RO as a recording medium for computer data
The demand for optical discs such as M is increasing, and recently, digital video discs (DV
D) and other next-generation high-density optical disks have appeared. These optical discs have a recording layer formed by evaporating a thin metal film such as aluminum on a synthetic resin substrate, and irradiating the recording layer with a laser beam through the synthetic resin substrate provides information to the recording layer. Recording or information reproduction from the recording layer is performed. Therefore, when handling and storing the optical disk, it is necessary to always keep the surface of the substrate on which the light beam enters the recording layer flat and to prevent the surface from being damaged.

When the surface of the substrate of the optical disk is damaged,
The light incident on the flaw is scattered, and the amount of laser light reaching the recording surface is reduced, so that reading and writing of data immediately below the flaw cannot be performed. Therefore, in order to be able to read this data again, it is necessary to remove scratches on the substrate surface so as not to cause scattering of laser light. As a method of realizing this, there is a method of polishing the substrate surface to remove scratches (hereinafter, referred to as “polishing method”).

As disclosed in Japanese Patent Application Laid-Open No. Hei 7-123838, an optical disk repairing apparatus using this polishing method attaches abrasive particles, such as a compound, to a disk-shaped or cylindrical-shaped polishing tool. A method of performing polishing by rotating on a substrate is generally used. Hereinafter, an optical disk repairing apparatus using a conventional polishing method will be described with reference to FIG.

FIG. 5 is a plan view showing the structure of an optical disk polishing apparatus using a polishing method. As shown in the figure, the optical disk polishing apparatus includes a housing 21 that houses the entire apparatus, an arm 22 that is detachably supported by the housing 21 with a base as a fulcrum, and holds the optical disk 1 in a rotatable state. A rotating body 23 that rotates in contact with the surface of the optical disk 1 held by the arm 22 and a rotation drive source 24 that rotates the rotating body 23 are provided. Rotating body 2
3 has a cylindrical outer peripheral surface, and when the optical disk 1 is mounted on the arm 22, the cylindrical outer peripheral surface is pressed against the substrate surface of the optical disk 1. The rotation drive source 24 includes the rotating body 2
3 is driven to rotate about its axis.

When the driving source 24 is driven while the rotating body 23 is pressed against the surface of the optical disk 1, the outer peripheral surface of the cylindrical body of the rotating body 23 wipes the surface of the optical disk 1. As a result, the surface of the recording / reading surface of the optical disk 1 is polished to remove scratches. At the same time, the rotation of the rotator 23 forcibly rotates the optical disc 1. In this case, the length of the rotating body 23 is set to be longer than the width of the recording layer of the optical disc 1, and the arm 22 is driven by a swing mechanism (not shown) so that the arm 22 is continuously small during polishing. Since the optical disk 1 is configured to swing at an angle, the surface of the recording / reading surface of the optical disk 1 can be evenly removed in combination with the forced rotation of the optical disk 1.

[0007]

In a conventional optical disk repairing apparatus for repairing by polishing, it is necessary to use a compound as an abrasive, and this compound is a mixture of fine particles in water or oil. Therefore, it is essential to wash and wipe the object to be polished after use. For this reason, there is a risk that the workability is deteriorated and that the work is again damaged during the cleaning / wiping operation.

Further, in polishing, it is necessary to select a compound according to the size of a scratch. Particularly, in the case of a large scratch, it is necessary to sequentially change from a coarse to a fine one and polish little by little. I do. In addition, since the polishing is a work of gradually polishing, it takes a long time, and the efficiency is very poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and provides an optical disk repairing apparatus capable of easily and quickly repairing a scratch on an optical disk surface without deteriorating workability and work environment. The purpose is to:

[0010]

An optical disk restoration apparatus according to the present invention utilizes the fact that an optical disk is thermoplastic.
The surface of the optical disk is softened by heating, and the softened optical disk is plastically deformed by applying pressure to repair the scratch. ADVANTAGE OF THE INVENTION According to this invention, operation | work is simple, the wiping operation | work after repair is unnecessary, and the working time can be drastically shortened for repair by plastic deformation.

[0011]

According to the first and second aspects of the present invention, a holding means for fixing and holding an optical disc, and a contact portion for contacting a disc surface on a reading surface side of the optical disc held by the holding means are provided. Contact means having, and a water-repellent means for covering the contact portion surface of the contact means with a water-repellent member,
Heating means for heating the contact part of the contact means, and pressing means for pressing the contact part of the heated contact means against the optical disc, wherein the pressing means presses the heated contact part of the contact means against the optical disc; Has the effect of easily and quickly repairing the scratches on the disk surface of the optical disk without deteriorating the workability and the working environment. Covering with a water-repellent member also has the effect of improving the releasability from the optical disk during the repair of the scratch and improving the smoothness of the optical disk surface.

According to a third aspect of the present invention, there is provided a holding means for fixing and holding an optical disc, a contact means having a contact portion for contacting a disc surface on a reading surface side of the optical disc held by the holding means, A heating means for heating a contact portion of the contact means, and a pressing means for pressing the contact portion of the heated contact means against the optical disc, wherein the surface of the contact portion of the contact means and / or the fat or oil on the surface of the optical disc are water-repellent To prevent the oil film from being cut by restoring the scratches on the optical disc surface by pressing the heated contact portion of the contact means against the optical disc with the pressing means, and to stabilize the smoothness of the optical disc surface to be repaired. Can be.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a schematic diagram showing an optical disk restoring apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view of a heat roller according to Embodiment 1 of the present invention.

In each of the drawings, the optical disk restoration apparatus according to the first embodiment includes a dinner table 4 as a holding means for rotatably supporting the optical disk 1 to be restored, and reading of the optical disk 1 supported by the dinner table 4. A heat roller 5 formed of a substantially conical cylindrical body having a smooth curved outer peripheral side surface in contact with the disk surface on the surface side; a halogen lamp 6 housed inside the heat roller 5 and heating the heat roller 5; , An elastic roller 7 disposed opposite to the heat roller 5 and formed of a substantially conical body
And a drive mechanism 8 for rotating the elastic roller 7 about an axis. The drive mechanism 8 is housed in the housing 2 having the cover 3.

The heat roller 5 is made of a material having high thermal conductivity, such as aluminum or copper, and has a substantially conical interior formed as a cavity. The halogen lamp 6 is disposed in a substantially conical internal cavity of the heat roller 5,
The radiant heat due to the light emission is transmitted to the inner surface of the heat roller 5, and the surface of the heat roller 5 is heated. The heat roller 5 is provided with a temperature sensor (not shown) for measuring the temperature, compares the temperature measured by the temperature sensor with a preset temperature, and turns on / off the halogen lamp 6. To maintain the surface temperature of the heat roller 5 at the set temperature. The surface of the heat roller 5 is covered with a water-repellent resin 18 (Teflon resin or the like) and is formed smoothly, and has a surface roughness of 0.2 μm.
It is in a state close to a mirror surface of less than m.

The elastic roller 7 is formed by covering the periphery of a metal shaft made of iron, aluminum, or the like with an elastic material. The elastic roller 7 is disposed at a position where the optical disk 1 is sandwiched together with the heat roller 5 so that the outer surface thereof comes into contact with the optical disk 1. It is arranged at an angle. That is, the elastic roller 7 is attached to the housing 2 with its axis inclined such that the outer surface of the elastic roller 7 is positioned at substantially the same height as the optical disk supporting surface of the turntable 4. Elastic roller 7
The elastic body is required to be able to withstand high temperatures and not be deformed or set even after long-time use, and is made of a material such as silicone rubber or a heat-resistant elastomer. Further, a driving mechanism 8 including a reduction gear for rotating the elastic roller 7 about the axis and a motor is connected to the elastic roller 7.

The heat roller 5 is attached to the support member 9 via a sliding metal, a bearing or the like so that the heat roller 5 can freely rotate about a central axis. The support member 9 is tilted so that the outer surface thereof comes into contact with the optical disk 1.
Attached to. The support member 9 is disposed on the cover 3 via a support elastic body 10 such as a spring so that the support member 9 can move vertically with respect to the plane of the optical disc 1 with the cover 3 closed. Further, the supporting elastic body 9 is
The support member 9 is pressed in the direction of the optical disc 1 so that the heat roller 5 and the elastic roller 7 sandwich the optical disc 1 while pressing the optical disc 1 in a state in which is closed.

Hereinafter, the operation principle of the optical disk restoration apparatus according to the present embodiment will be described. The optical disc 1 is mounted on the evening table 4 from the outside with the cover 3 opened. The turntable 4 is provided with a clamp device (not shown) using a magnet or a plurality of balls used in the optical disk device, and clamps the optical disk 1 so that the optical disk 1 can freely rotate about the rotation axis of the evening table 4. I do. When the cover 3 is opened, the optical disk 1 fixed to the turntable 4 is sandwiched between the heat roller 5 and the elastic roller 7, and is pressed by the supporting elastic body 10.

Since the optical disk 1 is formed of a thermoplastic resin such as polycarbonate, the optical disk 1 softens when the temperature increases. Therefore, the surface temperature of the heat roller 5 is set to the glass transition point of the optical disc 1 (about 130 ° C. for polycarbonate).
Raise to 80-125 ° C below. This heat is transmitted to the optical disk 1 and softens the optical disk 1. Since the surface of the softened optical disc 1 is pressed against the surface of the heat roller 5, it is plastically deformed along the surface of the heat roller 5.

Here, since the surface of the heat roller 5 is a plane close to the mirror surface as described above, the mirror surface state of the heat roller 5 is transferred to the surface of the optical disk 1, so that the surface roughness of the heat roller 5 and the optical disk 1 Is important for improving the surface roughness of the optical disc 1. However, if the adhesiveness is increased, the temperature drops when the heat roller 5 separates from the softened optical disk 1, and the releasability between the heat roller 5 and the optical disk 1 is significantly deteriorated. In some cases, the resin on the surface is peeled off and the smoothness of the optical disc 1 is deteriorated.

Since the surface of the heat roller 5 of the present invention is coated with a water-repellent resin 18 (Teflon-based resin or the like), the peeling performance between the optical disk 1 and the heat roller 5 is improved, and the disk surface after restoration is improved. Is improved, and the surface of the optical disc 1 is processed to a state close to a mirror surface.

Since the surface of the optical disc 1 has a flaw of several microns in height and depth, the surface of the optical disc 1 is completely smoothed by processing to the mirror surface. That is, the scratch is erased.

Then, by rotating the elastic roller 7 by a driving device 8 connected to the elastic roller 7, this state is performed over the entire circumference of the optical disk 1, and
The surface of the optical disk 1 becomes a good smooth surface, and the optical disk 1 can be repaired.

(Embodiment 2) FIG. 4 is an explanatory view of a surface of a heat roller for heating an optical disk and an additional device of an optical disk restoring device according to a second embodiment. Unlike the heat roller 5 of the first embodiment, by applying a water-repellent oil (such as Teflon-based oil) to the surface of the roller material, the peeling performance between the optical disc 1 and the heat roller 5 is improved as in the first embodiment. The smoothness of the disk surface after restoration can be improved.

Further, as a portion to which a water-repellent oil or fat is applied, the surface of the heat roller 5 before the wound is repaired, the optical disc 1, or both of them, for example, an oil applicator 1
By applying at 9, the oil film can be prevented from being cut and the smoothness of the surface of the optical disk to be repaired can be stabilized.

[0026]

As described above, the present invention makes use of the fact that the optical disk is thermoplastic, thereby heating the surface of the optical disk to soften it, and applying pressure to the softened optical disk to plastically deform the optical disk, thereby causing damage. Since the optical disk is repaired, the optical disk can be easily repaired and the processing time can be shortened, so that the difficulty of handling and the inefficiency of the grinding method, which are problems, can be solved, and the operation can be simplified and the processing time can be shortened. It has the effect of.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an optical disk restoration device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the heat roller according to the first embodiment of the present invention.

FIG. 3 is a schematic diagram illustrating an optical disk restoration device according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram illustrating an optical disk restoration device according to a second embodiment of the present invention.

FIG. 5 is a plan view showing the configuration of a conventional optical disk repair apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical disk 2 Case 3 Cover 4 Evening table 5 Heat roller 6 Halogen lamp 7 Elastic roller 8 Drive mechanism 9 Support member 10 Support elastic body 11 Evacuation device 12 Motor 13 Pinion gear 14 Guide groove 15 Rack gear 16 Guide pin 17 Preheater 18 Water repellent resin layer 19 Oil and fat coating device

Claims (3)

[Claims] 1. A holding means for fixing and holding an optical disc, a contact means having a contact portion for contacting a disc surface on a reading surface side of the optical disc held by the holding means, and a contact portion surface of the contact means being water-repellent. A water-repellent means for covering with a member having heat, a heating means for heating a contact portion of the contact means, and a pressing means for pressing the contact portion of the heated contact means against an optical disc; An optical disk repairing apparatus for repairing a scratch on an optical disk surface by pressing a heated contact portion against the optical disk. 2. The optical disk restoration apparatus according to claim 1, wherein said water repellent means is a resin having water repellency. 3. A holding means for fixedly holding an optical disc, a contact means having a contact portion for contacting a disc surface on a reading surface side of the optical disc held by the holding means, and a heating means for heating a contact portion of the contact means. Means for pressing the contact portion of the heated contact means against the optical disc, and applying a water-repellent oil or fat to the surface of the contact portion of the contact means and / or the surface of the optical disc; An optical disk repairing device for pressing a heated contact portion of the contact means against the optical disk to repair a scratch on the optical disk surface.