JPS5265404A - Information recording original disk being furnished with pattern for d etecting focus position - Google Patents

Information recording original disk being furnished with pattern for d etecting focus position

Info

Publication number
JPS5265404A
JPS5265404A JP14267975A JP14267975A JPS5265404A JP S5265404 A JPS5265404 A JP S5265404A JP 14267975 A JP14267975 A JP 14267975A JP 14267975 A JP14267975 A JP 14267975A JP S5265404 A JPS5265404 A JP S5265404A
Authority
JP
Japan
Prior art keywords
focus position
etecting
furnished
pattern
information 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
JP14267975A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5630612B2 (US06650917-20031118-M00005.png
Inventor
Toshiaki Kashihara
Yoshihiro Okino
Seiji Nishino
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14267975A priority Critical patent/JPS5265404A/ja
Publication of JPS5265404A publication Critical patent/JPS5265404A/ja
Publication of JPS5630612B2 publication Critical patent/JPS5630612B2/ja
Granted 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
    • G11B7/08—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
    • G11B7/0945—Methods for initialising servos, start-up sequences

Landscapes

  • Manufacturing Optical Record Carriers (AREA)
JP14267975A 1975-11-26 1975-11-26 Information recording original disk being furnished with pattern for d etecting focus position Granted JPS5265404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14267975A JPS5265404A (en) 1975-11-26 1975-11-26 Information recording original disk being furnished with pattern for d etecting focus position

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14267975A JPS5265404A (en) 1975-11-26 1975-11-26 Information recording original disk being furnished with pattern for d etecting focus position

Publications (2)

Publication Number Publication Date
JPS5265404A true JPS5265404A (en) 1977-05-30
JPS5630612B2 JPS5630612B2 (US06650917-20031118-M00005.png) 1981-07-16

Family

ID=15320984

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14267975A Granted JPS5265404A (en) 1975-11-26 1975-11-26 Information recording original disk being furnished with pattern for d etecting focus position

Country Status (1)

Country Link
JP (1) JPS5265404A (US06650917-20031118-M00005.png)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5883339A (ja) * 1981-11-10 1983-05-19 Teac Co 光学的情報記録再生装置において最適フォ−カス状態を得る方法
JPS58100235A (ja) * 1981-12-11 1983-06-14 Victor Co Of Japan Ltd 情報記録円盤及びその文字記録方式
JPS58100249A (ja) * 1981-12-09 1983-06-14 Matsushita Electric Ind Co Ltd 光学情報記録用担体
JPS61140440U (US06650917-20031118-M00005.png) * 1985-02-22 1986-08-30

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5883339A (ja) * 1981-11-10 1983-05-19 Teac Co 光学的情報記録再生装置において最適フォ−カス状態を得る方法
JPS6233652B2 (US06650917-20031118-M00005.png) * 1981-11-10 1987-07-22 Teac Corp
JPS58100249A (ja) * 1981-12-09 1983-06-14 Matsushita Electric Ind Co Ltd 光学情報記録用担体
JPH0127494B2 (US06650917-20031118-M00005.png) * 1981-12-09 1989-05-29 Matsushita Electric Ind Co Ltd
JPS58100235A (ja) * 1981-12-11 1983-06-14 Victor Co Of Japan Ltd 情報記録円盤及びその文字記録方式
JPH05797B2 (US06650917-20031118-M00005.png) * 1981-12-11 1993-01-06 Victor Company Of Japan
JPS61140440U (US06650917-20031118-M00005.png) * 1985-02-22 1986-08-30

Also Published As

Publication number Publication date
JPS5630612B2 (US06650917-20031118-M00005.png) 1981-07-16

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