FR2798503A1 - Device for the protection and renewal of digital optical data discs comprises transparent and weakly adhesive polymer film pre-cut so as to cover completely data-containing zone of optical disc - Google Patents
Device for the protection and renewal of digital optical data discs comprises transparent and weakly adhesive polymer film pre-cut so as to cover completely data-containing zone of optical disc Download PDFInfo
- Publication number
- FR2798503A1 FR2798503A1 FR9911707A FR9911707A FR2798503A1 FR 2798503 A1 FR2798503 A1 FR 2798503A1 FR 9911707 A FR9911707 A FR 9911707A FR 9911707 A FR9911707 A FR 9911707A FR 2798503 A1 FR2798503 A1 FR 2798503A1
- Authority
- FR
- France
- Prior art keywords
- film
- optical disc
- optical
- discs
- weakly adhesive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 31
- 239000002998 adhesive polymer Substances 0.000 title 1
- 229920006254 polymer film Polymers 0.000 title 1
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000000853 adhesive Substances 0.000 claims abstract description 5
- 230000001070 adhesive effect Effects 0.000 claims abstract description 5
- 230000003993 interaction Effects 0.000 claims abstract description 3
- 229920002994 synthetic fiber Polymers 0.000 claims abstract description 3
- 239000002313 adhesive film Substances 0.000 claims abstract 2
- 238000009418 renovation Methods 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 13
- 230000001681 protective effect Effects 0.000 description 6
- 239000011241 protective layer Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24056—Light transmission layers lying on the light entrance side and being thinner than the substrate, e.g. specially adapted for Blu-ray® discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/50—Reconditioning of record carriers; Cleaning of record carriers ; Carrying-off electrostatic charges
- G11B23/505—Reconditioning of record carriers; Cleaning of record carriers ; Carrying-off electrostatic charges of disk carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
- G11B7/2542—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers consisting essentially of organic resins
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
présente invention a pour objet un dispositif pour la protection et la rénovation disques optiques. The present invention relates to a device for the protection and renovation of optical discs.
peut convenir à tous les types de disques optiques numériques, souvent désignes par les terme de "disques laser" ou "disques compacts", il s'agisse de disques musicaux (CDA), de disques informatiques (CÉDÉROMS) ou nouveaux disques enregistrables (CDR et CDRR, ou encore des disques video (DVD). may be suitable for all types of digital optical discs, often referred to as "laser discs" or "compact discs", such as music discs (CDA), computer discs (CD-ROMs) or new recordable discs (CDRs) and CDRR, or video discs (DVD).
disque optique est constitué de deux faces : une "face de dessous" qui traversée par le faisceau laser de lecture et une face de dessus portant généralement des informations caractérisant le disque. Par exemple, dans le cas d'un disque optique musical, la "face de dessus" sera celle sur laquelle sont imprimés les titres des morceaux et la "face de dessous" celle qui est transparente. optical disc consists of two faces: a "bottom face" which passes through the reading laser beam and a top face generally carrying information characterizing the disc. For example, in the case of a musical optical disc, the "top side" will be the one on which the song titles are printed and the "bottom side" the one which is transparent.
L'information est contenue dans une couche mince réfléchissante prise en sandwich entre deux couches protectrices : une couche de protection supérieure imprimable et une couche support inférieure de protection en polymère transparent. The information is contained in a thin reflective layer sandwiched between two protective layers: an upper printable protective layer and a lower protective support layer in transparent polymer.
lecture des informations s'effectue au moyen d'un faisceau laser émis par une tete mobile se déplaçant radialement à proximité de la "face de dessous". Pour lire les informations portées par la couche mince réfléchissante, faisceau laser doit traverser la couche support inférieure sans être perturbée, nécessite que la surface externe de cette couche doit être parfaitement régulière polie. information is read by means of a laser beam emitted by a movable head moving radially near the "bottom face". To read the information carried by the thin reflective layer, the laser beam must pass through the lower support layer without being disturbed, requires that the external surface of this layer must be perfectly regular polished.
Lors des manipulations d'un disque optique, il arrive que l'utilisateur raye la face de dessous du disque. Les rayures perturbent la propagation du faisceau laser de lecture et peuvent donc empêcher la lecture d'une partie des informations contenues dans le disque, bien que ces informations ne soient pas perdues. Les perturbations entraînées par les rayures sont principalement liées à leur géometrie réfraction ou diffraction du faisceau laser de lecture. Le dispositif selon la présente invention a pour objectif de remédier à cet état de choses. II permet en effet de rénover des disques optiques dont la "face de dessous" est rayée. De plus, il remplit la fonction de couche de protection sacrificielle car il peut être placé et remplacé par l'utilisateur. When handling an optical disc, the user may scratch the underside of the disc. The scratches disturb the propagation of the reading laser beam and can therefore prevent the reading of part of the information contained in the disc, although this information is not lost. The disturbances caused by the scratches are mainly related to their refraction or diffraction geometry of the reading laser beam. The device according to the present invention aims to remedy this state of affairs. It makes it possible to renovate optical discs whose "underside" is scratched. In addition, it fulfills the function of sacrificial protective layer because it can be placed and replaced by the user.
En outre, en plus de protéger des rayures, ce dispositif protège également contre tous les types de salissures (poussières, traces de doigts, etc) qui peuvent aussi perturber le fonctionnement du disque optique. In addition, in addition to protecting from scratches, this device also protects against all types of soiling (dust, fingerprints, etc.) which can also disturb the operation of the optical disc.
II est constitué d'un film plastique transparent et iblement adhésif prédécoupé à la taille du disque optique devant être protégé, ce fil étant réalisé dans un matériau ne perturbant pas la propagation du faisceau laser lecture et étant destiné à être appliqué sur la "face de dessous" du disque, située côté de la tête de lecture, après que celle-ci a été rayée, ou préventivement pour protéger. It consists of a transparent plastic film which is delicately adhesive pre-cut to the size of the optical disc to be protected, this wire being made of a material which does not disturb the propagation of the reading laser beam and being intended to be applied to the "face of below "of the disc, located next to the read head, after it has been scratched, or preventively to protect.
les dessins annexés, donnés à titre d'exemple limitatif d'une des formes de réalisation de l'objet de l'invention: figure 1 représente schématiquement une coupe transversale partielle montrant structure d'un disque optique, figures 2, 3 et 4 montrent, dans les mêmes conditions, respective ment un faisceau laser traversant une couche inférieure support en bon état, un faisceau laser perturbé par une rayure de la face de dessous, le même faisceau non perturbé, malgré la rayure, grâce à la présence du film de protection, la figure 5 représente la face de dessous d'un disque optique non revêtu de film de protection, figure 6 représente un film de protection la figure 7 montre la face de dessous revêtue du film de protection de la figure 6. the accompanying drawings, given by way of limiting example of one of the embodiments of the subject of the invention: FIG. 1 schematically represents a partial cross section showing the structure of an optical disc, FIGS. 2, 3 and 4 show , under the same conditions, respectively a laser beam passing through a lower support layer in good condition, a laser beam disturbed by a scratch on the underside, the same undisturbed beam, despite the scratch, thanks to the presence of the film of protection, FIG. 5 represents the underside of an optical disc not coated with protective film, FIG. 6 represents a protective film FIG. 7 shows the underside coated with the protective film of FIG. 6
Le disque optique 1 (figure 1) est constitué successivement en partant de la "face de dessus" 2 - d'une couche de protection 3 imprimable d'une couche réfléchissante 4 portant les informations et d'une couche support 5 transparente. - et d'une couche support 5 transparente. The optical disc 1 (FIG. 1) consists successively starting from the "top face" 2 - of a protective layer 3 printable of a reflective layer 4 carrying the information and of a transparent support layer 5. - And a transparent support layer 5.
La surface externe de la couche support 5, ou "face de dessous" 6 doit être rigoureusement plane de façon à ne pas perturber le rayon laser 7 de lecture. Si cette surface comporte une déformation ou des rayures 8, le rayon laser 7 sera dévié ou déformé (diffraction), entraînant des pertes d'informations (figure 3). The external surface of the support layer 5, or "bottom face" 6 must be strictly plane so as not to disturb the reading laser beam 7. If this surface has a deformation or scratches 8, the laser beam 7 will be deflected or deformed (diffraction), causing loss of information (Figure 3).
Le dispositif selon l'invention est constitué film 9 mince et transparent s'appliquant sur cette surface rayée accidentellement apte à "remplir" les rayures 8. Ainsi, si les indices optiques du film de protection de la couche de "support" sont voisins, il y a rénovation du disque, c'est-à-dire que les informations rendues illisibles par les rayures sont à nouveau accessibles (figure 4). The device according to the invention consists of a thin and transparent film 9 applying to this scratched surface accidentally capable of "filling" the scratches 8. Thus, if the optical indices of the protective film of the "support" layer are close, there is a renovation of the disc, that is to say that the information made illegible by scratches is again accessible (Figure 4).
Si le film 9 a été posé préventivement avant disque 1 ne soit rayé, c'est film lui-même qui va être rayé. Dès lors, il suffit retirer ou de le remplacer un film neuf pour faire disparaître ces rayures. Si rayures sont très profondes, est-à-dire plus profondes que l'épaisseur du film 9 de protection, l'application nouveau film les fera disparaître selon le processus précédemment décrit. If the film 9 has been placed preventively before disc 1 is scratched, it is the film itself which will be scratched. Therefore, simply remove or replace a new film to remove these scratches. If the scratches are very deep, that is to say deeper than the thickness of the protective film 9, the application of the new film will make them disappear according to the process described above.
Le film 9 est faiblement adhésif et prédécoupé pour recouvrir complètement la zone 10 contenant les informations. The film 9 is weakly adhesive and precut to completely cover the area 10 containing the information.
L'adhérence du film sur la "face de dessous" 6 du disque 1 peut être assurée en recouvrant l'une de ses surfaces d'une couche de colle faiblement adhésive, du type utilisé pour les feuillets "post-it" pouvant être retirés et recollés plusieurs fois, ou simplement par les diverses interactions (forces électrostatiques) qui existent entre le film et le disque 1. The adhesion of the film on the "underside" 6 of the disc 1 can be ensured by covering one of its surfaces with a layer of weakly adhesive glue, of the type used for "post-it" sheets which can be removed. and glued several times, or simply by the various interactions (electrostatic forces) that exist between the film and the disc 1.
Le film 9 sera réalisé en matière synthétique souple telle que polyoléfine, polycarbonate ou polychlorure de vinyle. Son épaisseur sera inférieure à 100 Nm pour ne pas perturber le bon fonctionnement de la tête de lecture. II devra présenter une faible biréfringence, ainsi qu'un coefficient de dilatation thermique et un indice optique voisins de ceux du matériau constituant la couche support 5 du disque optique 1.The film 9 will be made of flexible synthetic material such as polyolefin, polycarbonate or polyvinyl chloride. Its thickness will be less than 100 Nm so as not to disturb the proper functioning of the read head. It should have a low birefringence, as well as a coefficient of thermal expansion and an optical index close to those of the material constituting the support layer 5 of the optical disc 1.
Le positionnement des divers éléments constitutifs donne à l'objet de l'invention un maximum d'effets utiles qui avaient pas été, à ce jour, obtenus par des dispositifs similaires. The positioning of the various constituent elements gives the object of the invention a maximum of useful effects which had not, to date, been obtained by similar devices.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9911707A FR2798503A1 (en) | 1999-09-15 | 1999-09-15 | Device for the protection and renewal of digital optical data discs comprises transparent and weakly adhesive polymer film pre-cut so as to cover completely data-containing zone of optical disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9911707A FR2798503A1 (en) | 1999-09-15 | 1999-09-15 | Device for the protection and renewal of digital optical data discs comprises transparent and weakly adhesive polymer film pre-cut so as to cover completely data-containing zone of optical disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2798503A1 true FR2798503A1 (en) | 2001-03-16 |
Family
ID=9550019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9911707A Withdrawn FR2798503A1 (en) | 1999-09-15 | 1999-09-15 | Device for the protection and renewal of digital optical data discs comprises transparent and weakly adhesive polymer film pre-cut so as to cover completely data-containing zone of optical disc |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2798503A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2404277A (en) * | 2003-07-24 | 2005-01-26 | Rashed Mahmood Aslam | Anti-scratch system for an optically read disc |
| GB2424309A (en) * | 2005-03-16 | 2006-09-20 | Peter Willett | Sacrificial Disc Protection Covering And Applicator |
-
1999
- 1999-09-15 FR FR9911707A patent/FR2798503A1/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2404277A (en) * | 2003-07-24 | 2005-01-26 | Rashed Mahmood Aslam | Anti-scratch system for an optically read disc |
| GB2424309A (en) * | 2005-03-16 | 2006-09-20 | Peter Willett | Sacrificial Disc Protection Covering And Applicator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU714235B2 (en) | Semi-permanent enclosure for optical data storage device | |
| JP2000509878A (en) | Playable optical picture disc | |
| FR2798503A1 (en) | Device for the protection and renewal of digital optical data discs comprises transparent and weakly adhesive polymer film pre-cut so as to cover completely data-containing zone of optical disc | |
| RU2004107578A (en) | HIGH-DENSITY TWO-LAYER OPTICAL DISC | |
| FR2528216A1 (en) | OPTICAL DISC PROTECTED WITH FREE LAYER HOLDER | |
| GB2279799A (en) | Shield for optical data storage medium | |
| JP2009187625A (en) | Optical information recording medium and manufacturing method thereof | |
| JPH0766563B2 (en) | Optical memory structure | |
| JP2009032300A (en) | Optical information recording medium and manufacturing method of optical information recording medium | |
| US20040205805A1 (en) | Disk shield for optical disks designed to protect DVDs and video game disks | |
| BE1007702A5 (en) | Face on protected disc digital optical reading. | |
| KR200193753Y1 (en) | Optical disk | |
| AU716870B3 (en) | Compact disk protector | |
| JP3125370B2 (en) | optical disk | |
| JPS61198445A (en) | Optical disc | |
| JPH1011803A (en) | Optical information recording medium | |
| JP2002288879A (en) | Phase change information recording medium | |
| JP3035111U (en) | Compact disc surface protector | |
| JP2005310307A (en) | High-density information recording medium | |
| JPS63119034A (en) | Information recording medium | |
| KR19980035089U (en) | Compact discs with scratch shield | |
| JP3200153B2 (en) | Optical information recording medium | |
| GB2404277A (en) | Anti-scratch system for an optically read disc | |
| JP2889523B2 (en) | Magneto-optical disk | |
| JP2002208183A (en) | Optical disk |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |