DE2624380B1 - Video signal recording disc - with greater thickness on periphery than in centre to prevent height wobble - Google Patents

Video signal recording disc - with greater thickness on periphery than in centre to prevent height wobble

Info

Publication number
DE2624380B1
DE2624380B1 DE19762624380 DE2624380A DE2624380B1 DE 2624380 B1 DE2624380 B1 DE 2624380B1 DE 19762624380 DE19762624380 DE 19762624380 DE 2624380 A DE2624380 A DE 2624380A DE 2624380 B1 DE2624380 B1 DE 2624380B1
Authority
DE
Germany
Prior art keywords
greater thickness
centre
periphery
video signal
signal recording
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.)
Granted
Application number
DE19762624380
Other languages
German (de)
Other versions
DE2624380C2 (en
Inventor
Werner Ing Heuer
Heinrich Ing Reinmueller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Polygram GmbH
Original Assignee
Polygram GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Polygram GmbH filed Critical Polygram GmbH
Priority to DE19762624380 priority Critical patent/DE2624380B1/en
Publication of DE2624380B1 publication Critical patent/DE2624380B1/en
Application granted granted Critical
Publication of DE2624380C2 publication Critical patent/DE2624380C2/de
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00Record 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
    • G11B23/0014Record 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
    • G11B23/0021Record 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/24003Shapes of record carriers other than disc shape

Abstract

An information carrier disc with a high storage density of picture and video signals for high speed reproduction, made of thermoplastic material, has a greater thickness near the rim than near the disc centre hole. The thickness increases pref. steadily in the radial outward direction. Adequate running stability is achieved at the high speeds for optical reproduction, without any height wobble.

Description

Patentansprüche: 1. Plattenförmiger, aus wärmehärtbarem Material bestehender Informationsträger hoher Speicherdichte, insbesondere für Bild- bzw. Videosignale, der zur Wiedergabe der in Form von Oberflächenstrukturen eingespeicherten Signale in eine schnelle Drehbewegung versetzt wird, d a d u r c h g e -kennzeichnet, daß der Informationsträger im Bereich des Plattenrandes eine größere Dicke aufweist als im Bereich des Plattenmittelochs. Claims: 1. Plate-shaped, made of thermosetting material Existing information carriers of high storage density, especially for image or Video signals that are used to reproduce the stored in the form of surface structures Signals are set in a rapid rotary motion, d u r c h g e - indicates, that the information carrier has a greater thickness in the area of the plate edge than in the area of the plate center hole.

2. Informationsträger nach Anspruch 1, dadurch gekennzeichnet, daß die Plattendicke zum Plattenrand hin stetig zunimmt. 2. Information carrier according to claim 1, characterized in that the plate thickness increases steadily towards the edge of the plate.

3. Informationsträger nach Anspruch 1, dadurch gekennzeichnet, daß der die größere Plattendicke aufweisende äußere Bereich des im übrigen Bereich gleichmäßig dicken Trägers als flacher Stabilisierungsring ausgebildet ist. 3. Information carrier according to claim 1, characterized in that the outer area with the greater plate thickness is uniform in the remaining area thick carrier is designed as a flat stabilizing ring.

4. Informationsträger nach Anspruch 3, dadurch gekennzeichnet, daß der Stabilisierungsring zu beiden Seiten über die Informationsträgerebene hinausreicht. 4. Information carrier according to claim 3, characterized in that the stabilization ring extends beyond the information carrier level on both sides.

5. Informationsträger nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die maximale Plattendicke wenigstens doppelt so groß gewählt ist wie der Wert minimaler Plattendicke. 5. Information carrier according to one of the preceding claims, characterized characterized in that the maximum plate thickness is chosen to be at least twice as large is like the value of the minimum plate thickness.

Die Erfindung bezieht sich auf einen plattenförmigen, aus wärmehärtbarem Material bestehenden Informationsträger hoher Speicherdichte, insbesondere für Bild-bzw. Videosignale, der zur Wiedergabe der in Form von Oberflächenstrukturen eingespeicherten Signale in eine schnelle Drehbewegung versetzt wird. The invention relates to a plate-shaped, made of thermosetting Material existing information carriers of high storage density, in particular for image or. Video signals that are used to reproduce the stored in the form of surface structures 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 show purely on the outside show certain similarities with conventional records, but differ of these in particular due to the very different playback conditions, of which as essential the much higher speed and the associated mechanical-dynamic stabilization difficulties with regard to compliance the lowest possible vertical and lateral runout are to be mentioned.

Bei flexiblen Folienspeichern, die mit Geschwindigkeiten zwischen 500 und 3000 Ulmin 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 erwünscht. In the case of flexible film storage systems that operate at speeds between Rotate 500 and 3000 Ulmin, it is known, for example, the required running stability by one between a rigid stabilization plane and the rotating foil to achieve the forming air cushion. However, this method can be used for rotating Disc-shaped information carriers not or only because of their greater rigidity can be used with much less success. The other hand is the use of disc-shaped information carriers that are similar to the currently known records can be produced from thermoplastic materials by a pressing process, for various reasons, including the greater precession in information mapping very welcome.

Die der vorliegenden Erfindung zugrunde liegende Aufgabe besteht nun darin, einen Informationsträger in der Weise auszubilden, daß im Wiedergabebetrieb, d. h. The object on which the present invention is based exists now in developing an information carrier in such a way that in playback mode, d. H.

bei relativ hohen Umdrehungszahlen, eine insbesondere für die Wiedergabe auf optischem Wege ausreichende Laufstabilität ohne nennenswerten Höhenschlag erzielt werden kann.at relatively high speeds, especially one for playback Sufficient running stability is achieved optically without any noteworthy run-out can be.

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. Starting from a plate-shaped information carrier of the initially mentioned type 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 are the features can be found in the subclaims.

Im folgenden werden zwei Ausführungsbeispiele der Erfindung an Hand der Zeichnung näher erläutert. In the following, two exemplary embodiments of the invention will be given the drawing explained in more detail.

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 Ulmin 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 dirn Bereich des Plattenzentrums. The F i g. 1 shows an information carrier shown in section 1, which is made of thermosetting material in the manner of a record and at least on one side a spiral signal track in the form of surface structures stored and preferably optically readable signals, in particular Video signals. In this case when playing back at one revolution speed from Z. B. 1500 Ulmin rotating information carrier 1 is to achieve a largely Horizontal run-out rotational movement along the radius line of different sizes Material thickness provided such that the thickness in the area of the plate center is smallest and increases steadily towards the edge of the plate. The thickness of the plate occurring there D is chosen to be at least twice as large as the plate thickness 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 sprungartiger 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. In the case of the in FIG. 2 illustrated embodiment of an inventive trained information carrier 1 'is instead of a steady transition There is a sudden transition from the thinner central area to the thicker outer area. 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 carrier plate level The stabilizing ring 2 can be made of plastic material together with the carrier body, but it can also be made from another, dimensionally stable material and with the support body by gluing, welding or the like.

Claims (1)

verbunden werden.get connected.
DE19762624380 1976-05-31 1976-05-31 Video signal recording disc - with greater thickness on periphery than in centre to prevent height wobble Granted DE2624380B1 (en)

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 true DE2624380B1 (en) 1977-06-08
DE2624380C2 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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105374A1 (en) * 1982-02-05 1984-04-18 Matsushita Electric Industrial Co., Ltd. Optical recording/reproduction disc
EP0129225A1 (en) * 1983-06-20 1984-12-27 POLYGRAM GmbH Disc-shaped optically readable information carrier with protective rim
FR2559608A1 (en) * 1984-02-14 1985-08-16 Philips Nv OPTICALLY READABLE MEMORY DISC

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105374A1 (en) * 1982-02-05 1984-04-18 Matsushita Electric Industrial Co., Ltd. Optical recording/reproduction disc
EP0105374A4 (en) * 1982-02-05 1985-07-01 Matsushita Electric Ind Co Ltd Optical recording/reproduction disc.
EP0129225A1 (en) * 1983-06-20 1984-12-27 POLYGRAM GmbH Disc-shaped optically readable information carrier with protective rim
FR2559608A1 (en) * 1984-02-14 1985-08-16 Philips Nv OPTICALLY READABLE MEMORY DISC

Also Published As

Publication number Publication date
DE2624380C2 (en) 1978-01-26

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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