BE825379A - RECORD HOLDER ON WHICH INFORMATION IS RECORDED IN AN OPTICALLY READABLE STRUCTURE - Google Patents

RECORD HOLDER ON WHICH INFORMATION IS RECORDED IN AN OPTICALLY READABLE STRUCTURE

Info

Publication number
BE825379A
BE825379A BE153229A BE153229A BE825379A BE 825379 A BE825379 A BE 825379A BE 153229 A BE153229 A BE 153229A BE 153229 A BE153229 A BE 153229A BE 825379 A BE825379 A BE 825379A
Authority
BE
Belgium
Prior art keywords
recorded
information
optically readable
record holder
readable structure
Prior art date
Application number
BE153229A
Other languages
French (fr)
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 filed Critical
Publication of BE825379A publication Critical patent/BE825379A/en

Links

Classifications

    • 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
    • G11B7/004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005Reproducing
    • 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
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0938Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following servo format, e.g. guide tracks, pilot signals
    • 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
    • G11B7/2407Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085Pits
BE153229A 1974-02-12 1975-02-10 RECORD HOLDER ON WHICH INFORMATION IS RECORDED IN AN OPTICALLY READABLE STRUCTURE BE825379A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7401858A NL7401858A (en) 1974-02-12 1974-02-12 REGISTRATION CARRIER ON WHICH INFORMATION IS INDICATED IN AN OPTICALLY READABLE STRUCTURE.

Publications (1)

Publication Number Publication Date
BE825379A true BE825379A (en) 1975-08-11

Family

ID=19820729

Family Applications (1)

Application Number Title Priority Date Filing Date
BE153229A BE825379A (en) 1974-02-12 1975-02-10 RECORD HOLDER ON WHICH INFORMATION IS RECORDED IN AN OPTICALLY READABLE STRUCTURE

Country Status (16)

Country Link
JP (1) JPS50119517A (en)
AT (1) AT338889B (en)
AU (1) AU497709B2 (en)
BE (1) BE825379A (en)
CA (1) CA1047644A (en)
CH (1) CH592350A5 (en)
DE (1) DE2503975A1 (en)
DK (1) DK138567B (en)
ES (2) ES434588A1 (en)
FR (1) FR2260911B1 (en)
GB (1) GB1501141A (en)
IT (1) IT1031581B (en)
NL (1) NL7401858A (en)
NO (1) NO750416L (en)
SE (1) SE410808B (en)
ZA (1) ZA75131B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7510035A (en) * 1975-08-26 1977-03-01 Philips Nv REGISTRATION CARRIER WITH AN OPTICALLY READABLE, TRACK-SIZED, INFORMATION STRUCTURE AND DEVICE FOR READING THIS.
JPS5363002A (en) * 1976-11-18 1978-06-06 Sony Corp Signal recording system and disk type medium for recording signal
US4161752A (en) * 1977-06-28 1979-07-17 International Business Machines Corporation High density video disk having two pit depths
NL7803517A (en) * 1978-04-03 1979-10-05 Philips Nv RECORD CARRIER WITH AN OPTICALLY READABLE PHASE STRUCTURE AND DEVICE FOR READING.
JPS57103132A (en) * 1980-12-16 1982-06-26 Matsushita Electric Ind Co Ltd Recording information carrier and its recorder and reproducer
NL8100098A (en) * 1981-01-12 1982-08-02 Philips Nv RECORD CARRIER WITH OPTICALLY READABLE INFORMATION STRUCTURE.
GB8309447D0 (en) * 1983-04-07 1983-05-11 Combined Tech Corp Plc Optical data storage
US4623784A (en) * 1984-12-20 1986-11-18 Drexler Technology Corporation Laser recording apparatus with off-center lens and error detection
DE68923833T2 (en) * 1988-06-20 1996-06-13 Mitsubishi Electric Corp Optical head with tilt correction servomechanism.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3314052A (en) * 1963-04-12 1967-04-11 Ibm Light modulation system
FR2014594B1 (en) * 1968-07-15 1974-02-22 Ibm
JPS5117405B2 (en) * 1972-05-15 1976-06-02

Also Published As

Publication number Publication date
NO750416L (en) 1975-08-13
ATA98275A (en) 1977-01-15
GB1501141A (en) 1978-02-15
DK138567B (en) 1978-09-25
JPS50119517A (en) 1975-09-19
CA1047644A (en) 1979-01-30
AT338889B (en) 1977-09-26
CH592350A5 (en) 1977-10-31
DK45475A (en) 1975-10-06
DK138567C (en) 1979-03-05
ZA75131B (en) 1976-08-25
ES452770A1 (en) 1977-10-01
IT1031581B (en) 1979-05-10
ES434588A1 (en) 1977-03-16
AU7802575A (en) 1976-08-12
SE410808B (en) 1979-11-05
FR2260911A1 (en) 1975-09-05
NL7401858A (en) 1975-08-14
FR2260911B1 (en) 1982-03-05
SE7501407L (en) 1975-08-13
DE2503975A1 (en) 1975-08-14
AU497709B2 (en) 1979-01-04

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