DE3810438A1 - Cylinder store for magnetic-optical or optical data storage and reproduction - Google Patents

Cylinder store for magnetic-optical or optical data storage and reproduction

Info

Publication number
DE3810438A1
DE3810438A1 DE19883810438 DE3810438A DE3810438A1 DE 3810438 A1 DE3810438 A1 DE 3810438A1 DE 19883810438 DE19883810438 DE 19883810438 DE 3810438 A DE3810438 A DE 3810438A DE 3810438 A1 DE3810438 A1 DE 3810438A1
Authority
DE
Germany
Prior art keywords
cylinder
optical
rotational speed
constant
information
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Withdrawn
Application number
DE19883810438
Other languages
German (de)
Inventor
Wilhelm Koenig
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19883810438 priority Critical patent/DE3810438A1/en
Publication of DE3810438A1 publication Critical patent/DE3810438A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/20—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
    • G11B21/21—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier with provision for maintaining desired spacing of head from record carrier, e.g. fluid-dynamic spacing, slider
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/02—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using cylindrical record 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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0025—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with cylinders or cylinder-like carriers or cylindrical sections or flat carriers loaded onto a cylindrical surface, e.g. truncated cones

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

The configuration of the cylinder store permits use of the entire available information surface, with a constant rotational speed of the cylinder. Due to constant flow conditions on the outer and inner surface of the cylinder, a higher reading and programming reliability can be achieved. The design of this cylinder allows a more stable configuration, which permits less expensive processing. For the information density per unit area this has the result that no increase in the spacing of the information markings has to be expected in the running direction of the track on account of rotational speed tolerances which are required due to +/- accelerations.

Description

In der Festspeichertechnik werden heute ausschließlich runde Platten benutzt. Durch die immer größer werdende Informationsdichte wird eine immer höher werdende An­ forderung an die Genauigkeit der Platten gestellt. Der Bearbeitungsaufwand zur Erzeugung der ausreichenden Oberflächenqualität ist sehr kostspielig, insbesondere dann, wenn Glas als Trägermaterial - wegen der besonde­ ren Oberflächenbeschaffenheit - benutzt werden soll. Dadurch, daß die runden Platten mit möglichst großer Informationsdichte versehen werden sollen, müssen sie bei der Ablesung und Programmierung entsprechend des jeweils benutzten Durchmessers angetrieben werden. Bei größten heute verwendeten Platten (340 mm ⌀), be­ deutet das ein Geschwindigkeitsverhältnis von 1:10. Wegen der zu beschleunigenden Masse müssen die Platten sehr dünn gehalten werden, um die Verlustzeiten für Beschleunigung und Verzögerung der Platten möglichst klein zu halten - und damit auch die Motorleistungen. Bringt man nun alle Informationen auf einen einheit­ lichen Durchmesser, kann man mit gleichbleibender Drehzahl für alle Ablese- und Programmierbereiche auf der Informationsfläche gearbeitet werden. Diese Bedingung erfüllt der Zylinder (1). Ein Zylin­ der kann in seiner Konstruktion sehr stabil aufgebaut werden und in einer Zylinderaufnahme (6) gehalten, kann er mit dieser zusammen - in einer Aufspannung - innen und außen bearbeitet werden. Diese stabile Kon­ struktion ermöglicht eine kostengünstigere Herstellung, da auf das Gewicht der Konstruktion nicht mehr das Au­ genmerk gerichtet werden muß, das bei der Herstellung der Platte ausschlaggebend ist.In round storage technology only round plates are used today. Due to the ever increasing information density, the demands on the accuracy of the plates are increasing. The processing required to generate the sufficient surface quality is very costly, especially when glass as support material - to be used - because of Customized ren finish. Because the round plates are to be provided with the greatest possible density of information, they must be driven during reading and programming in accordance with the diameter used in each case. For the largest plates used today (340 mm ⌀), this means a speed ratio of 1:10. Because of the mass to be accelerated, the plates have to be kept very thin in order to keep the loss times for acceleration and deceleration of the plates as small as possible - and thus also the engine power. If you now bring all information to a uniform diameter, you can work at a constant speed for all reading and programming areas on the information area. The cylinder ( 1 ) fulfills this condition. A cylinder can be built very stably in its construction and held in a cylinder holder ( 6 ), it can be machined together with it - in one setting - inside and outside. This stable con construction enables a more cost-effective production, since the weight of the construction no longer has to be focused on the eye, which is crucial in the manufacture of the plate.

Bei einer Platte, mit einem Durchmesser D, steht eine Informationsfläche von 2 × zur Verfügung. Bei einem entsprechenden Zylinder von 2 × D × π × H (die Wandstärke des Zylinders (1) und die Bohrung der Platte sind unberücksichtigt), so ergibt sich für H = . Bei einem Durchmesser von 340 mm sind das 85 mm. Die erforderlichen Antriebe (4) für Zy­ linder und Abtastköpfe lassen sich innerhalb des Zylin­ ders platzsparend unterbringen, so daß ein Zylinder­ speicher vom Platzbedarf her nicht mehr benötigt, als die herkömmliche Version des Plattenspeichers. Eine Sandwichbauweise ist ebenfalls möglich; hierbei vervielfältigen sich sogar die Antriebs- und Zeitvor­ teile mit der Anzahl der verwendeten Zylinder statt Platten.For a plate with a diameter D , an information area of 2 × is available. With a corresponding cylinder of 2 × D × π × H (the wall thickness of the cylinder ( 1 ) and the bore of the plate are not taken into account), we get for H =. With a diameter of 340 mm, this is 85 mm. The required drives ( 4 ) for Zy cylinder and readheads can be accommodated in a space-saving manner within the cylinder, so that a cylinder memory does not require more space than the conventional version of the disk memory. A sandwich construction is also possible; this even multiplies the drive and Zeitvor parts with the number of cylinders used instead of plates.

Für die Beschichtung (mit der Informationsschicht) auf der Zylinderaußenseite ergibt sich noch der Vor­ teil, daß die Zentrifugalkräfte zur Ablösung der Schicht immer nur 1/10 der zeitweise auftretenden Kräfte sind, wenn die heute übliche Platte im kleinen Durchmesserbereich benutzt wird.For the coating (with the information layer) on the outside of the cylinder there is still the front part that the centrifugal forces to detach the Shift always only 1/10 of the occasionally occurring Forces are when today's usual plate in small Diameter range is used.

Ein weiterer Vorteil dieser Konstruktion ist, daß sich die Luftströmung an der Oberfläche des Zylinders (ob innen oder außen) auf einen, der Drehzahl ent­ sprechenden konstanten Faktor einstellt, der in allen Ablesebereichen annähernd gleich ist. Im Gegensatz zu einer Platte, auf der 1. wegen der Form und 2. wegen der unterschiedlichen Geschwindigkeiten sehr unter­ schiedliche Luftströmungen herrschen, die einen uner­ wünschten Einfluß auf Schwebehöhe des Ablesekopfes haben. Bei der Zylinderkonstruktion läßt sich daher mit einer geringeren Schwebehöhe arbeiten und damit mit einer erhöhten Sicherheit für Programmierung und Able­ sung. Another advantage of this construction is that the air flow on the surface of the cylinder (whether inside or outside) on one, the speed ent speaking constant factor that sets in all Reading ranges is approximately the same. In contrast to a plate, on the 1st because of the shape and the 2nd because of of very different speeds different air currents prevail, which one un wanted influence on the height of the reading head to have. When designing the cylinder, you can therefore use work at a lower hovering height and thus with increased security for programming and reading solution.  

Ein besonderer Vorteil des Zylinderspeichers ist die Tatsache, daß durch die Möglichkeit mit konstanter Umfangsgeschwindigkeit in Laufrichtung der Informa­ tionsspur gefahren werden kann. Dadurch, daß es keine Beschleunigungen und Verzögerungen mehr gibt, kann mit einem geringeren Platzbedarf in Spurrichtung ge­ rechnet werden, da der Sicherheitsabstand von Informa­ tionspunkt zu Informationspunkt kleiner sein kann.A particular advantage of the cylinder memory is that Fact that through the possibility of constant Circumferential speed in the direction of the informa tion lane can be driven. Because there is none Accelerations and decelerations can do more with a smaller space requirement in the track direction can be expected because the safety distance from Informa point to information point can be smaller.

Claims (1)

Zylinderspeicher für magnetisch-optische oder optische Datenspeicherung, dadurch gekennzeichnet, daß als be­ schichtbare Informationsfläche die Innen- und Außen­ fläche eines Zylinders (1) - aus Glas oder entspre­ chenden Werkstoffen - benutzt wird, um die Ablesung und Programmierung, bei gleichbleibender Informationsdichte und gleichbleibender Rotationsgeschwindigkeit zu reali­ sieren; angetrieben durch den Motor (4) mit konstanter Rotationsgeschwindigkeit, ohne Drehzahlanpassung, mit den problematischen Beschleunigungen und Verzögerungen, die beim Datenzugriff die Verzögerungen bringen, da die Positionierung der Lese- und Programmierungsköpfe (11 und 15) relativ schnell bewerkstelligt werden kann, - über z. B. Gewindespindeln (12 und 14) - mit dem Antriebsmotor (13), wird diese nun zeitbestimmend sein und dadurch einen wesentlich schnelleren Datenzugriff ermöglichen.Cylinder memory for magnetic-optical or optical data storage, characterized in that the inside and outside surface of a cylinder ( 1 ) - made of glass or corresponding materials - is used as a layerable information surface for reading and programming, with constant information density and constant Realize rotational speed; driven by the motor ( 4 ) with constant rotational speed, without speed adjustment, with the problematic accelerations and delays that bring delays when accessing data, since the positioning of the reading and programming heads ( 11 and 15 ) can be accomplished relatively quickly, - via z . B. threaded spindles ( 12 and 14 ) - with the drive motor ( 13 ), this will now be time-determining and thereby enable a much faster data access.
DE19883810438 1988-03-26 1988-03-26 Cylinder store for magnetic-optical or optical data storage and reproduction Withdrawn DE3810438A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19883810438 DE3810438A1 (en) 1988-03-26 1988-03-26 Cylinder store for magnetic-optical or optical data storage and reproduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19883810438 DE3810438A1 (en) 1988-03-26 1988-03-26 Cylinder store for magnetic-optical or optical data storage and reproduction

Publications (1)

Publication Number Publication Date
DE3810438A1 true DE3810438A1 (en) 1989-10-12

Family

ID=6350854

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19883810438 Withdrawn DE3810438A1 (en) 1988-03-26 1988-03-26 Cylinder store for magnetic-optical or optical data storage and reproduction

Country Status (1)

Country Link
DE (1) DE3810438A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0750308A1 (en) * 1995-06-23 1996-12-27 Toshinobu Futagawa High speed information read/write system
WO2002101745A1 (en) * 2001-06-13 2002-12-19 Investian As Cylindrical storage medium

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018246B (en) * 1954-09-01 1957-10-24 Ferranti Ltd Electrical & Gene Magnetic drum storage
US3140474A (en) * 1960-07-13 1964-07-07 Burroughs Corp Magnetic memory drum
US3145386A (en) * 1962-02-16 1964-08-18 Sperry Rand Corp Information storage device
US3431617A (en) * 1965-07-22 1969-03-11 Philips Corp Cylindrical drum
DE1926452A1 (en) * 1968-05-23 1970-04-23 Madatron Corp Magnet drum assembly
DE1524795B2 (en) * 1966-06-20 1972-03-02 International Business Machines Corp., Armonk, N.Y. (V.StA.) DEVICE FOR SUCCESSIVE READING OF MAGNETICALLY STORED INFORMATION
DE3239659A1 (en) * 1981-10-27 1983-05-11 Victor Company Of Japan, Ltd., Yokohama, Kanagawa RECORDING AND / OR PLAYING DEVICE
DE3300311A1 (en) * 1982-01-10 1983-07-21 Victor Company Of Japan, Ltd., Yokohama, Kanagawa HOLLOW AND CYLINDRICAL RECORDING MATERIAL FOR A RECORDING AND / OR PLAYBACK DEVICE
DE3331776A1 (en) * 1982-09-02 1984-03-08 Fuji Electrochemical Co., Ltd., Tokyo MAGNETIC DRUM HEAD SYSTEM

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018246B (en) * 1954-09-01 1957-10-24 Ferranti Ltd Electrical & Gene Magnetic drum storage
US3140474A (en) * 1960-07-13 1964-07-07 Burroughs Corp Magnetic memory drum
US3145386A (en) * 1962-02-16 1964-08-18 Sperry Rand Corp Information storage device
US3431617A (en) * 1965-07-22 1969-03-11 Philips Corp Cylindrical drum
DE1524795B2 (en) * 1966-06-20 1972-03-02 International Business Machines Corp., Armonk, N.Y. (V.StA.) DEVICE FOR SUCCESSIVE READING OF MAGNETICALLY STORED INFORMATION
DE1926452A1 (en) * 1968-05-23 1970-04-23 Madatron Corp Magnet drum assembly
DE3239659A1 (en) * 1981-10-27 1983-05-11 Victor Company Of Japan, Ltd., Yokohama, Kanagawa RECORDING AND / OR PLAYING DEVICE
DE3300311A1 (en) * 1982-01-10 1983-07-21 Victor Company Of Japan, Ltd., Yokohama, Kanagawa HOLLOW AND CYLINDRICAL RECORDING MATERIAL FOR A RECORDING AND / OR PLAYBACK DEVICE
DE3331776A1 (en) * 1982-09-02 1984-03-08 Fuji Electrochemical Co., Ltd., Tokyo MAGNETIC DRUM HEAD SYSTEM

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
DE-Buch: LÖBEL, Guido *
DE-Buch: STEINBUCH, K.: Taschenbuch der Nach- richtenverarbeitung. Springer-Verlag, Berlin, Heidelberg, New York 1967, S.589-592 *
MÜLLER, Peter: Lexikon der Datenverarbeitung, Verlag moderne industrie, 4. Aufl., 1969, S.355 *
SCHMID, Hans *
US-Zeitschriften:IBM Technical Disclosure BulletinVol.16, No.11, April 1974 *
Vol.13, No.12, May 1971 *
Vol.14, No.11, April 1972 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0750308A1 (en) * 1995-06-23 1996-12-27 Toshinobu Futagawa High speed information read/write system
US5754517A (en) * 1995-06-23 1998-05-19 Futagawa; Toshinobu High speed information read/write system
WO2002101745A1 (en) * 2001-06-13 2002-12-19 Investian As Cylindrical storage medium

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8139 Disposal/non-payment of the annual fee