JPS60173728A - 光ヘッド - Google Patents

光ヘッド

Info

Publication number
JPS60173728A
JPS60173728A JP59011074A JP1107484A JPS60173728A JP S60173728 A JPS60173728 A JP S60173728A JP 59011074 A JP59011074 A JP 59011074A JP 1107484 A JP1107484 A JP 1107484A JP S60173728 A JPS60173728 A JP S60173728A
Authority
JP
Japan
Prior art keywords
laser
output level
medium
adjusted
group
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
JP59011074A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0414424B2 (enrdf_load_stackoverflow
Inventor
Norihiro Funakoshi
宣博 舩越
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP59011074A priority Critical patent/JPS60173728A/ja
Publication of JPS60173728A publication Critical patent/JPS60173728A/ja
Publication of JPH0414424B2 publication Critical patent/JPH0414424B2/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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
JP59011074A 1984-01-26 1984-01-26 光ヘッド Granted JPS60173728A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59011074A JPS60173728A (ja) 1984-01-26 1984-01-26 光ヘッド

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59011074A JPS60173728A (ja) 1984-01-26 1984-01-26 光ヘッド

Publications (2)

Publication Number Publication Date
JPS60173728A true JPS60173728A (ja) 1985-09-07
JPH0414424B2 JPH0414424B2 (enrdf_load_stackoverflow) 1992-03-12

Family

ID=11767827

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59011074A Granted JPS60173728A (ja) 1984-01-26 1984-01-26 光ヘッド

Country Status (1)

Country Link
JP (1) JPS60173728A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62281129A (ja) * 1986-05-30 1987-12-07 Matsushita Electric Ind Co Ltd 光デイスク装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62281129A (ja) * 1986-05-30 1987-12-07 Matsushita Electric Ind Co Ltd 光デイスク装置

Also Published As

Publication number Publication date
JPH0414424B2 (enrdf_load_stackoverflow) 1992-03-12

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term