DE2624380C2 - - Google Patents
Info
- Publication number
- DE2624380C2 DE2624380C2 DE19762624380 DE2624380A DE2624380C2 DE 2624380 C2 DE2624380 C2 DE 2624380C2 DE 19762624380 DE19762624380 DE 19762624380 DE 2624380 A DE2624380 A DE 2624380A DE 2624380 C2 DE2624380 C2 DE 2624380C2
- Authority
- DE
- Germany
- Prior art keywords
- information carrier
- area
- plate
- plate thickness
- carrier according
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 230000001747 exhibiting effect Effects 0.000 claims 1
- 239000000969 carrier Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- G11B23/0014—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 record carriers not specifically of filamentary or web form
- G11B23/0021—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 record carriers not specifically of filamentary or web form discs
-
- 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
- G11B7/24003—Shapes of record carriers other than disc shape
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
Die Erfindung bezieht sich auf einen plattenförmigen, aus wärmehärtbarem Material bestehenden Informationsträger hoher Speicherdichte, insbesondere für Bildbzw. Videosignale, der zur Wiedergabe der in Form von Oberflächenstrukturen eingespeicherten Signale in eine schnelle Drehbewegung versetzt wird.The invention relates to a plate-shaped information carrier made of thermosetting material high storage density, especially for image or Video signals that are used to reproduce the in the form of Surface structures stored signals is set in a rapid rotary motion.
Plattenförmige Informationsträger für Videosignale weisen rein äußerlich gewisse Ähnlichkeiten mit herkömmlichen Schallplatten auf, unterscheiden sich jedoch von diesen insbesondere durch die sehr unterschiedlichen Wiedergabebedingungen, von denen als wesentliche die um vieles höhere Drehzahl und die damit verbundenen mechanisch-dynamischen Stabilisierungsschwierigkeiten in bezug auf die Einhaltung eines möglichst geringen Höhen- und Seitenschlages zu nennen sind.Disc-shaped information carriers for video signals have certain external similarities conventional records, however, differ from these in particular by the very different playback conditions, of which the much higher speed and the associated mechanical-dynamic stabilization difficulties with regard to compliance with a the lowest possible vertical and lateral runout are to be mentioned.
Bei flexiblen Folienspeichern, die mit Geschwindigkeiten zwischen 500 und 3000 U/min rotieren, ist es beispielsweise bekannt, die erforderliche Laufstabilität durch ein zwischen einer starren Stabilisierungsebene und der rotierenden Folie sich ausbildendes Luftpolster zu erreichen. Dieses Verfahren kann jedoch für rotierende plattenförmige Informationsträger wegen deren höherer Steifigkeit nicht oder nur mit sehr viel geringerem Erfolg angewandt werden. Andererseits ist die Verwendung von plattenförmigen Informationsträgern, die ähnlich den derzeit bekannten Schallplatten durch einen Preßvorgang aus thermoplastischen Materialien hergestellt werden können, aus verschiedenen Gründen, unter anderem wegen der größeren Präzession bei der Informationsabbildung sehr erwünschtIt is with flexible film storage systems that rotate at speeds between 500 and 3000 rpm For example, known the required running stability through a between a rigid stabilization plane and to reach the rotating film forming air cushion. However, this procedure can be used for rotating disk-shaped information carriers because of their greater rigidity not or only with a great deal with less success. On the other hand, the use of disc-shaped information carriers, the similar to the currently known records by a pressing process from thermoplastic materials can be made for a variety of reasons, including greater precession very desirable for information mapping
Die der vorliegenden Erfindung zugrunde liegende Aufgabe besteht nun darin, einen Informationsträger inThe object on which the present invention is based is now to provide an information carrier in
ίο der Weise auszubilden, daß im Wiedergabebetrieb, d. h. bei relativ hohen Umdrehungszahlen, eine insbesondere für die Wiedergabe auf optischem Wege ausreichende Laufstabilität ohne nennenswerten Höhenschlag erzielt werden kann.ίο train in such a way that in the playback mode, d. H. at relatively high revolutions per minute, which is sufficient, in particular, for reproduction by optical means Running stability can be achieved without any appreciable runout.
IS Ausgehend von einem plattenförmigen Informationsträger der eingangs genannten Art wird dies erfindungsgemäß in der Weise erreicht, daß der Informationsträger im Bereich des Plattenrandes eine größere Dicke aufweist als im Bereich des Plattenmittellochs.IS Starting from a plate-shaped information carrier of the type mentioned above, this is achieved according to the invention in such a way that the information carrier has a greater thickness in the area of the plate edge than in the area of the plate center hole.
Vorteilhafte Weiterbildungen des Erfindungsgedankens sind den Merkmalen der Unteransprüche entnehmbar. Advantageous further developments of the inventive concept can be found in the features of the subclaims.
Im folgenden werden zwei Ausführungsbeispiele der Erfindung an Hand der Zeichnung näher erläutert.In the following two exemplary embodiments of the invention are explained in more detail with reference to the drawing.
Die F i g. 1 zeigt einen im Schnitt dargestellten Informationsträger 1, der nach Art einer Schallplatte aus wärmehärtbarem Material hergestellt ist und wenigstens auf einer Seite eine spiralförmige Signalspur mit in Form von Oberflächenstrukturen eingespeicherten und vorzugsweise auf optischem Wege auslesbaren Signalen, insbesondere Videosignalen, aufweist. Bei diesem bei der Wiedergabe mit einer Umdrehungsgeschwindigkeit von z. B. 1500 U/min rotierenden Informationsträger 1 ist zur Erzielung einer weitgehend höhenschlagfreien Rotationsbewegung eine längs der Radiuslinie unterschiedlich große Materialstärke vorgesehen, derart, daß die Dicke im Bereich des Plattenzentrums am kleinsten ist und zum Plattenrand hin stetig zunimmt. Die dort auftretende Plattendicke D ist dabei wenigstens doppelt so groß gewählt wie die Plattendikke c/im Bereich des Plattenzentrums.The F i g. 1 shows an information carrier 1, shown in section, made of thermosetting material in the manner of a record and having at least one side a spiral signal track with signals, in particular video signals, stored in the form of surface structures and preferably optically readable. In this when playing with a rotational speed of z. B. 1500 U / min rotating information carrier 1 is provided along the radius line of differently large material thickness to achieve a largely vertical stroke-free rotational movement, such that the thickness in the area of the plate center is smallest and increases steadily towards the edge of the plate. The plate thickness D occurring there is selected to be at least twice as large as the plate thickness c / in the area of the plate center.
Bei der in F i g. 2 dargestellten Ausführungsform eines erfindungsgemäß ausgebildeten Informationsträgers 1' ist an Stelle eines stetigen Übergangs ein sprungartigerIn the case of the in FIG. 2 illustrated embodiment of an information carrier 1 'designed according to the invention is a jump-like transition instead of a steady transition
Übergang vom dünneren Mittelbereich zum dickeren Außenbereich vorgesehen. Der dünnere Bereich mit der Dicke d umfaßt dabei den gesamten Informationsbereich, während der dickere Bereich mit der Dicke D lediglich aus einem flachen Stabilisierungsring 2 besteht, der zu beiden Seiten über die Trägerplattenebene hinausragt. Der Stabilisierungsring 2 kann dabei zusammen mit dem Trägerkörper aus Kunststoffmaterial hergestellt werden, er kann aber auch aus einem anderen, formbeständigen Material gefertigt und mit dem Trägerkörper durch Kleben, Schweißen od. dgl. verbunden werden.Transition from the thinner central area to the thicker outer area provided. The thinner area with the thickness d encompasses the entire information area, while the thicker area with the thickness D consists only of a flat stabilizing ring 2 which protrudes on both sides over the plane of the carrier plate. The stabilizing ring 2 can be made of plastic material together with the carrier body, but it can also be made of another, dimensionally stable material and connected to the carrier body by gluing, welding or the like.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19762624380 DE2624380B1 (en) | 1976-05-31 | 1976-05-31 | Video signal recording disc - with greater thickness on periphery than in centre to prevent height wobble |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19762624380 DE2624380B1 (en) | 1976-05-31 | 1976-05-31 | Video signal recording disc - with greater thickness on periphery than in centre to prevent height wobble |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2624380B1 DE2624380B1 (en) | 1977-06-08 |
DE2624380C2 true DE2624380C2 (en) | 1978-01-26 |
Family
ID=5979432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19762624380 Granted DE2624380B1 (en) | 1976-05-31 | 1976-05-31 | Video signal recording disc - with greater thickness on periphery than in centre to prevent height wobble |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2624380B1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0105374B1 (en) * | 1982-02-05 | 1989-04-19 | Matsushita Electric Industrial Co., Ltd. | Optical recording/reproduction disc |
DE3322131A1 (en) * | 1983-06-20 | 1984-12-20 | Polygram Gmbh, 2000 Hamburg | DISK-SHAPED, OPTICALLY READABLE INFORMATION CARRIER WITH PROTECTIVE EDGE |
NL8400477A (en) * | 1984-02-14 | 1985-09-02 | Philips Nv | OPTICALLY READABLE MEMORY DRIVE. |
-
1976
- 1976-05-31 DE DE19762624380 patent/DE2624380B1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
DE2624380B1 (en) | 1977-06-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8381 | Inventor (new situation) |
Free format text: HEUER, WERNER ING.(GRAD.), 3160 LEHRTE, DE REINMUELLER, HEINRICH ING.(GRAD.), 3000 HANNOVER, DE |
|
8339 | Ceased/non-payment of the annual fee |