JPS6449134A - Optical disk recording and reproducing device - Google Patents

Optical disk recording and reproducing device

Info

Publication number
JPS6449134A
JPS6449134A JP62205606A JP20560687A JPS6449134A JP S6449134 A JPS6449134 A JP S6449134A JP 62205606 A JP62205606 A JP 62205606A JP 20560687 A JP20560687 A JP 20560687A JP S6449134 A JPS6449134 A JP S6449134A
Authority
JP
Japan
Prior art keywords
beams
sub
track
tracks
main beam
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.)
Pending
Application number
JP62205606A
Other languages
Japanese (ja)
Inventor
Shigeru Kogure
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson 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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP62205606A priority Critical patent/JPS6449134A/en
Publication of JPS6449134A publication Critical patent/JPS6449134A/en
Pending legal-status Critical Current

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  • Optical Head (AREA)

Abstract

PURPOSE:To narrow a track pitch and to increase recording density by radiating a main beam and sub-beams to a recording/reproducing track and tracks on both the side of said track and finding out a difference between the reproduced signals of these beams. CONSTITUTION:A main beam 5 is radiated to a track 2 and sub-beams A, B are radiated to tracks 1, 3 in three adjacent tracks 1-3 from a diffraction grating or an array laser having three light emitting parts. At that time, signals on the tracks 1, 3 based upon two sub-beams A, B are reproduced and a difference between the reproduced signals of the sub-beams and that of the main beam 5 is found out. Since the reproducing time of the main beam and the sub-beams is different in accordance with a track speed and a beam position, a difference at the same time is found out by delaying the signals. Thereby, even if the track pitch is narrowed, crosstalk can be removed. Thus, the recording density can be sharply increased.
JP62205606A 1987-08-19 1987-08-19 Optical disk recording and reproducing device Pending JPS6449134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62205606A JPS6449134A (en) 1987-08-19 1987-08-19 Optical disk recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62205606A JPS6449134A (en) 1987-08-19 1987-08-19 Optical disk recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS6449134A true JPS6449134A (en) 1989-02-23

Family

ID=16509649

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62205606A Pending JPS6449134A (en) 1987-08-19 1987-08-19 Optical disk recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS6449134A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0628953A1 (en) * 1993-05-18 1994-12-14 Nec Corporation Cross-talk canceler for optical disk reading mechanism
EP0986056A2 (en) * 1998-09-07 2000-03-15 Pioneer Corporation Optical pickup and information reproducing apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0628953A1 (en) * 1993-05-18 1994-12-14 Nec Corporation Cross-talk canceler for optical disk reading mechanism
US5544141A (en) * 1993-05-18 1996-08-06 Nec Corportion Cross-talk canceler for optical disk reading mechanism
EP0986056A2 (en) * 1998-09-07 2000-03-15 Pioneer Corporation Optical pickup and information reproducing apparatus
EP0986056A3 (en) * 1998-09-07 2001-01-03 Pioneer Corporation Optical pickup and information reproducing apparatus

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