JPS6038742A - 光学ヘッド - Google Patents

光学ヘッド

Info

Publication number
JPS6038742A
JPS6038742A JP14636583A JP14636583A JPS6038742A JP S6038742 A JPS6038742 A JP S6038742A JP 14636583 A JP14636583 A JP 14636583A JP 14636583 A JP14636583 A JP 14636583A JP S6038742 A JPS6038742 A JP S6038742A
Authority
JP
Japan
Prior art keywords
light
receiving element
error signal
prism
split
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
JP14636583A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0227736B2 (enrdf_load_stackoverflow
Inventor
Masayuki Inoue
雅之 井上
Toshihiko Goto
敏彦 後藤
Yoshihiro Katase
片瀬　順弘
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14636583A priority Critical patent/JPS6038742A/ja
Publication of JPS6038742A publication Critical patent/JPS6038742A/ja
Publication of JPH0227736B2 publication Critical patent/JPH0227736B2/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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
JP14636583A 1983-08-12 1983-08-12 光学ヘッド Granted JPS6038742A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14636583A JPS6038742A (ja) 1983-08-12 1983-08-12 光学ヘッド

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14636583A JPS6038742A (ja) 1983-08-12 1983-08-12 光学ヘッド

Publications (2)

Publication Number Publication Date
JPS6038742A true JPS6038742A (ja) 1985-02-28
JPH0227736B2 JPH0227736B2 (enrdf_load_stackoverflow) 1990-06-19

Family

ID=15406069

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14636583A Granted JPS6038742A (ja) 1983-08-12 1983-08-12 光学ヘッド

Country Status (1)

Country Link
JP (1) JPS6038742A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4817074A (en) * 1985-12-19 1989-03-28 Nec Corporation Method and apparatus for detecting the focusing state and positioning accuracy of a light beam directed onto an optical disk tracking guide in an optical recording system
JPH03104773A (ja) * 1989-09-20 1991-05-01 Hitachi Ltd 連結器引上げ装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5746334A (en) * 1980-09-01 1982-03-16 Matsushita Electric Ind Co Ltd Optical information reproducer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5746334A (en) * 1980-09-01 1982-03-16 Matsushita Electric Ind Co Ltd Optical information reproducer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4817074A (en) * 1985-12-19 1989-03-28 Nec Corporation Method and apparatus for detecting the focusing state and positioning accuracy of a light beam directed onto an optical disk tracking guide in an optical recording system
JPH03104773A (ja) * 1989-09-20 1991-05-01 Hitachi Ltd 連結器引上げ装置

Also Published As

Publication number Publication date
JPH0227736B2 (enrdf_load_stackoverflow) 1990-06-19

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