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GB1516285A - Record carrier with an optically readable trackwise-arranged information structure and apparatus for the read-out thereof - Google Patents

Record carrier with an optically readable trackwise-arranged information structure and apparatus for the read-out thereof

Info

Publication number
GB1516285A
GB1516285A GB34976/76A GB3497676A GB1516285A GB 1516285 A GB1516285 A GB 1516285A GB 34976/76 A GB34976/76 A GB 34976/76A GB 3497676 A GB3497676 A GB 3497676A GB 1516285 A GB1516285 A GB 1516285A
Authority
GB
United Kingdom
Prior art keywords
read
tracks
spacing
recording carrier
trackwise
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
Application number
GB34976/76A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1516285A publication Critical patent/GB1516285A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
    • G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

It is intended that a read-out spot (V1) can be addressed quickly to a particular information part of the recording carrier (1). The tracks (2) of the recording carrier (1) are subdivided into two groups (a, b). The spacing (d1) between the tracks of the first group (a) is constant, as is the spacing (d2) between the tracks of the second group (b). The second spacing (d2) is greater than the first spacing (d1). The variation in the spacings (d1, d2) between the tracks (2) is about 10% of the average spacing. A read-out beam (11) of a laser (10) is focused by a lens (16) at the read-out spot (V1) on the recording carrier (1). After the reflection at the recording carrier (1), the read-out beam (11) is passed to a detector (14). In order to establish whether the read-out spot (V1) is addressed to the desired group of tracks, an auxiliary beam (l) is used. The auxiliary beam (l) is launched into the path of the read-out beam (11) and produces an addressing spot (V2) on the information carrier (1). The reflected part-beam (l+1) is reflected to two detectors (4, 5), which are connected to a differential amplifier (6). <IMAGE>
GB34976/76A 1975-08-26 1976-08-23 Record carrier with an optically readable trackwise-arranged information structure and apparatus for the read-out thereof Expired GB1516285A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7510035A NL7510035A (en) 1975-08-26 1975-08-26 REGISTRATION CARRIER WITH AN OPTICALLY READABLE, TRACK-SIZED, INFORMATION STRUCTURE AND DEVICE FOR READING THIS.

Publications (1)

Publication Number Publication Date
GB1516285A true GB1516285A (en) 1978-07-05

Family

ID=19824353

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34976/76A Expired GB1516285A (en) 1975-08-26 1976-08-23 Record carrier with an optically readable trackwise-arranged information structure and apparatus for the read-out thereof

Country Status (17)

Country Link
JP (1) JPS5228303A (en)
AT (1) AT351819B (en)
AU (1) AU505280B2 (en)
BE (1) BE845468A (en)
CA (1) CA1082356A (en)
CH (1) CH612781A5 (en)
DE (1) DE2636464C2 (en)
DK (1) DK378976A (en)
ES (1) ES450938A1 (en)
FR (1) FR2322418A1 (en)
GB (1) GB1516285A (en)
IT (1) IT1071416B (en)
NL (1) NL7510035A (en)
NO (1) NO762892L (en)
NZ (1) NZ181831A (en)
SE (1) SE424235B (en)
ZA (1) ZA764771B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048441A2 (en) * 1980-09-19 1982-03-31 Matsushita Electric Industrial Co., Ltd. Track searching arrangement for an optical information recording and reproducing apparatus
EP0124580A1 (en) * 1982-11-01 1984-11-14 Storage Technology Partners Fine and coarse servo system for access and tracking on an optical disk.
EP0227158A1 (en) * 1985-12-11 1987-07-01 Koninklijke Philips Electronics N.V. Device for determining a centring error of an information structure in an optical record, record-scanning apparatus provided with such device and record carrier for use in this apparatus
EP0241978A1 (en) * 1986-04-14 1987-10-21 Optical Storage International Holland Optical record carrier and apparatus for reading the record carrier
US4805162A (en) * 1982-11-01 1989-02-14 Storage Technology Partners Ii Fine and coarse servo system for access and tracking on an optical disk
US4945476A (en) * 1988-02-26 1990-07-31 Elsevier Science Publishing Company, Inc. Interactive system and method for creating and editing a knowledge base for use as a computerized aid to the cognitive process of diagnosis
US5724327A (en) * 1991-12-02 1998-03-03 U.S. Phillips Corporation Record carrier having first variations of a first physical parameter corresponding to information recorded thereon and second variations of a second physical parameter relating to recovery of the information

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122551A (en) * 1977-04-08 1978-10-24 Xerox Corporation Optical data storage and retrieval system
FR2396379A1 (en) * 1977-07-01 1979-01-26 Thomson Brandt OPTICAL INFORMATION DISC READER EQUIPPED WITH AN AUTOMATIC INFORMATION ACCESS DEVICE
NL7811003A (en) * 1978-11-06 1980-05-08 Philips Nv DISC-SHAPED, OPTICALLY READABLE RECORD CARRIER, AS A STORAGE MEDIUM FOR DATA INFORMATION.
JPS57105828A (en) * 1980-12-19 1982-07-01 Matsushita Electric Ind Co Ltd Optical disk recording and reproducing system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2037800A1 (en) * 1970-07-30 1972-02-03 Wittmoser Sound or image plate
NL7314267A (en) * 1973-10-17 1975-04-21 Philips Nv REGISTRATION CARRIER ON WHICH INFORMATION HAS BEEN MADE IN AN OPTICALLY READABLE STRUCTURE.
NL7401858A (en) * 1974-02-12 1975-08-14 Philips Nv REGISTRATION CARRIER ON WHICH INFORMATION IS INDICATED IN AN OPTICALLY READABLE STRUCTURE.

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048441A2 (en) * 1980-09-19 1982-03-31 Matsushita Electric Industrial Co., Ltd. Track searching arrangement for an optical information recording and reproducing apparatus
EP0048441A3 (en) * 1980-09-19 1982-08-04 Matsushita Electric Industrial Co., Ltd. Track locating system for optical recording and reproducing apparatus
US4805162A (en) * 1982-11-01 1989-02-14 Storage Technology Partners Ii Fine and coarse servo system for access and tracking on an optical disk
EP0124580A4 (en) * 1982-11-01 1986-08-22 Storage Technology Partners Fine and coarse servo system for access and tracking on an optical disk.
EP0124580A1 (en) * 1982-11-01 1984-11-14 Storage Technology Partners Fine and coarse servo system for access and tracking on an optical disk.
EP0227158A1 (en) * 1985-12-11 1987-07-01 Koninklijke Philips Electronics N.V. Device for determining a centring error of an information structure in an optical record, record-scanning apparatus provided with such device and record carrier for use in this apparatus
EP0241978A1 (en) * 1986-04-14 1987-10-21 Optical Storage International Holland Optical record carrier and apparatus for reading the record carrier
US4945476A (en) * 1988-02-26 1990-07-31 Elsevier Science Publishing Company, Inc. Interactive system and method for creating and editing a knowledge base for use as a computerized aid to the cognitive process of diagnosis
US5724327A (en) * 1991-12-02 1998-03-03 U.S. Phillips Corporation Record carrier having first variations of a first physical parameter corresponding to information recorded thereon and second variations of a second physical parameter relating to recovery of the information
US5737286A (en) * 1991-12-02 1998-04-07 U.S. Philips Corporation System and apparatus for recovering information from a record currier which exhibits variations of two different physical parameters thereof
US5930210A (en) * 1991-12-02 1999-07-27 U.S. Philips Corporation System and apparatus for recovering information from a record carrier which exhibits variations of two different physical parameters thereof
US6226244B1 (en) * 1991-12-02 2001-05-01 U.S. Philips Corporation Playback apparatus for a record carrier providing physical copy protection
US6363041B1 (en) * 1991-12-02 2002-03-26 U.S. Philips Corporation Record carrier with variations of different physical parameters thereof in different frequency bands during recording

Also Published As

Publication number Publication date
DE2636464A1 (en) 1977-03-03
ES450938A1 (en) 1977-12-01
CH612781A5 (en) 1979-08-15
ATA626776A (en) 1979-01-15
NZ181831A (en) 1980-09-12
FR2322418A1 (en) 1977-03-25
BE845468A (en) 1977-02-24
ZA764771B (en) 1978-03-29
AT351819B (en) 1979-08-10
JPS5228303A (en) 1977-03-03
CA1082356A (en) 1980-07-22
AU505280B2 (en) 1979-11-15
SE7609291L (en) 1977-02-27
NL7510035A (en) 1977-03-01
IT1071416B (en) 1985-04-10
DE2636464C2 (en) 1984-04-05
DK378976A (en) 1977-02-27
FR2322418B1 (en) 1981-09-25
SE424235B (en) 1982-07-05
AU1708076A (en) 1978-03-02
NO762892L (en) 1977-03-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee