JPS55157133A - Information recording and reproducing device - Google Patents

Information recording and reproducing device

Info

Publication number
JPS55157133A
JPS55157133A JP6144479A JP6144479A JPS55157133A JP S55157133 A JPS55157133 A JP S55157133A JP 6144479 A JP6144479 A JP 6144479A JP 6144479 A JP6144479 A JP 6144479A JP S55157133 A JPS55157133 A JP S55157133A
Authority
JP
Japan
Prior art keywords
signal
inputted
zigzag
detector
phase
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
JP6144479A
Other languages
Japanese (ja)
Other versions
JPS6223370B2 (en
Inventor
Kiichi Kamiyanagi
Kazuo Shigematsu
Takeshi Maeda
Toshio Sugiyama
Ryuichi Koike
Seiji Yonezawa
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 JP6144479A priority Critical patent/JPS55157133A/en
Publication of JPS55157133A publication Critical patent/JPS55157133A/en
Publication of JPS6223370B2 publication Critical patent/JPS6223370B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

PURPOSE: To trace stably tracks of high-density recording, by inverting the zigzag phase for every track to invert the code of the error signal dependent upon adjacent tracks.
CONSTITUTION: Semiconductor laser light 39 is condensed onto optical disc 9, and the reflection light is condensed to photodetector 43 by beam splitter 42 to convert information written in track 17 to electric signal 44. Signal 44 is inputted to demodulator 45 and envelope detector 50, and the demodulator output is inputted to horizontal syncthronizing signal and vertical signal distributers 46 and 47 and prewobbling (zigzag) phase information decoder 48. Meanwhile, the zigzag signal detected by detector 50 is inputted to phase detector 56 through BPF57 and amplifier 58, and the output becomes error signal 60 through LPF59. Consequently, this error signal can be used to trace stably tracks of high-density recording with a light spot.
COPYRIGHT: (C)1980,JPO&Japio
JP6144479A 1979-05-21 1979-05-21 Information recording and reproducing device Granted JPS55157133A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6144479A JPS55157133A (en) 1979-05-21 1979-05-21 Information recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6144479A JPS55157133A (en) 1979-05-21 1979-05-21 Information recording and reproducing device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP29481886A Division JPS62157333A (en) 1986-12-12 1986-12-12 Information reproducing device

Publications (2)

Publication Number Publication Date
JPS55157133A true JPS55157133A (en) 1980-12-06
JPS6223370B2 JPS6223370B2 (en) 1987-05-22

Family

ID=13171234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6144479A Granted JPS55157133A (en) 1979-05-21 1979-05-21 Information recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS55157133A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58218049A (en) * 1982-06-14 1983-12-19 Mansei Kogyo Kk Method for detecting focus control signal of optical information reader
JPS61260426A (en) * 1985-05-10 1986-11-18 アルカテル・トムソン・ジガデイスク Information medium with prerecord pattern and reader therefor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5239960A (en) * 1975-09-23 1977-03-28 Toyo Pulp Kk Method for treating stency sewage
JPS52153663A (en) * 1976-06-17 1977-12-20 Olympus Optical Co Ltd Playback apparatus fo disc form recording media

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5239960A (en) * 1975-09-23 1977-03-28 Toyo Pulp Kk Method for treating stency sewage
JPS52153663A (en) * 1976-06-17 1977-12-20 Olympus Optical Co Ltd Playback apparatus fo disc form recording media

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58218049A (en) * 1982-06-14 1983-12-19 Mansei Kogyo Kk Method for detecting focus control signal of optical information reader
JPS63854B2 (en) * 1982-06-14 1988-01-08 Mansei Kogyo Kk
JPS61260426A (en) * 1985-05-10 1986-11-18 アルカテル・トムソン・ジガデイスク Information medium with prerecord pattern and reader therefor

Also Published As

Publication number Publication date
JPS6223370B2 (en) 1987-05-22

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