JPS50119517A - - Google Patents

Info

Publication number
JPS50119517A
JPS50119517A JP50017757A JP1775775A JPS50119517A JP S50119517 A JPS50119517 A JP S50119517A JP 50017757 A JP50017757 A JP 50017757A JP 1775775 A JP1775775 A JP 1775775A JP S50119517 A JPS50119517 A JP S50119517A
Authority
JP
Japan
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.)
Pending
Application number
JP50017757A
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 JPS50119517A publication Critical patent/JPS50119517A/ja
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G11B7/09—Disposition 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
    • G11B7/0938—Disposition 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
    • 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
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
JP50017757A 1974-02-12 1975-02-12 Pending JPS50119517A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7401858A NL7401858A (nl) 1974-02-12 1974-02-12 Registratiedrager waarop informatie is aange- t in een optisch uitleesbare struktuur.

Publications (1)

Publication Number Publication Date
JPS50119517A true JPS50119517A (ja) 1975-09-19

Family

ID=19820729

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50017757A Pending JPS50119517A (ja) 1974-02-12 1975-02-12

Country Status (16)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103132A (en) * 1980-12-16 1982-06-26 Matsushita Electric Ind Co Ltd Recording information carrier and its recorder and reproducer
JPS57138065A (en) * 1981-01-12 1982-08-26 Philips Nv Recording carrier
JPS61500239A (ja) * 1983-04-07 1986-02-06 コムテツク　リサ−チ　ユニツト　リミテツド 光学的デ−タ記憶

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7510035A (nl) * 1975-08-26 1977-03-01 Philips Nv Registratiedrager met een optisch uitleesbare, langs sporen gerangschikte, informatiestruktuur en inrichting voor het uitlezen daarvan.
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 (nl) * 1978-04-03 1979-10-05 Philips Nv Registratiedrager met een optisch uitleesbare fase- struktuur en inrichting voor het uitlezen.
US4623784A (en) * 1984-12-20 1986-11-18 Drexler Technology Corporation Laser recording apparatus with off-center lens and error detection
DE68923833T2 (de) * 1988-06-20 1996-06-13 Mitsubishi Electric Corp Optischer Kopf mit Kippkorrekturservomechanismus.

Citations (2)

* 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
JPS499202A (ja) * 1972-05-15 1974-01-26

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2014594B1 (ja) * 1968-07-15 1974-02-22 Ibm

Patent Citations (2)

* 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
JPS499202A (ja) * 1972-05-15 1974-01-26

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103132A (en) * 1980-12-16 1982-06-26 Matsushita Electric Ind Co Ltd Recording information carrier and its recorder and reproducer
JPH0263259B2 (ja) * 1980-12-16 1990-12-27 Matsushita Electric Ind Co Ltd
JPS57138065A (en) * 1981-01-12 1982-08-26 Philips Nv Recording carrier
JPS61500239A (ja) * 1983-04-07 1986-02-06 コムテツク　リサ−チ　ユニツト　リミテツド 光学的デ−タ記憶

Also Published As

Publication number Publication date
DK138567C (ja) 1979-03-05
ZA75131B (en) 1976-08-25
NL7401858A (nl) 1975-08-14
GB1501141A (en) 1978-02-15
NO750416L (ja) 1975-08-13
IT1031581B (it) 1979-05-10
DE2503975A1 (de) 1975-08-14
AU497709B2 (en) 1979-01-04
DK138567B (da) 1978-09-25
FR2260911A1 (ja) 1975-09-05
CH592350A5 (ja) 1977-10-31
ATA98275A (de) 1977-01-15
SE7501407L (ja) 1975-08-13
BE825379A (fr) 1975-08-11
AU7802575A (en) 1976-08-12
DK45475A (ja) 1975-10-06
AT338889B (de) 1977-09-26
ES434588A1 (es) 1977-03-16
CA1047644A (en) 1979-01-30
ES452770A1 (es) 1977-10-01
FR2260911B1 (ja) 1982-03-05
SE410808B (sv) 1979-11-05

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