JPS641122A - Crosstalk eliminating circuit in optical reproducing device - Google Patents

Crosstalk eliminating circuit in optical reproducing device

Info

Publication number
JPS641122A
JPS641122A JP15625587A JP15625587A JPS641122A JP S641122 A JPS641122 A JP S641122A JP 15625587 A JP15625587 A JP 15625587A JP 15625587 A JP15625587 A JP 15625587A JP S641122 A JPS641122 A JP S641122A
Authority
JP
Japan
Prior art keywords
reproducing
reproducing signal
light
delay means
crosstalk component
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
JP15625587A
Other languages
Japanese (ja)
Other versions
JPH011122A (en
Inventor
Tadao Nagai
Tsuguaki Mashita
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.)
Teac Corp
Original Assignee
Teac 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 Teac Corp filed Critical Teac Corp
Priority to JP62-156255A priority Critical patent/JPH011122A/en
Priority claimed from JP62-156255A external-priority patent/JPH011122A/en
Publication of JPS641122A publication Critical patent/JPS641122A/en
Publication of JPH011122A publication Critical patent/JPH011122A/en
Pending legal-status Critical Current

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  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: To improve the quality of a reproducing signal by subtracting a reproducing signal of plural sub light beams at a proper level from a reproducing signal of a main light beam so as to obtain a reproduced video signal with crosstalk component almost eliminated therefrom.
CONSTITUTION: The reproduced main beam being the 0-th order diffracted light and plural control sub light beam being the diffracted light of the other except the 0-th order are radiated onto an information recording medium, and the 1st and 2nd reproducing signals obtained from the reflected light (or transmitted light) are subjected to correction of deviation in the reproducing time due to the floated location of the beam spot by delay means 4, 5, 6 and subject to time matching. Then the 1st and 2nd reproducing signals fetched from the delay means 4, 5, 6 are subjected to relative level adjustment respectively and then subtracted to cancel the crosstalk component in the 1st reproducing signal by the 2nd reproducing signal nearly. Thus, the 1st reproducing signal whose crosstalk component is reduced remarkably is fetched from the delay means 4, 5, 6.
COPYRIGHT: (C)1989,JPO&Japio
JP62-156255A 1987-06-23 Crosstalk removal circuit in optical playback device Pending JPH011122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62-156255A JPH011122A (en) 1987-06-23 Crosstalk removal circuit in optical playback device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62-156255A JPH011122A (en) 1987-06-23 Crosstalk removal circuit in optical playback device

Publications (2)

Publication Number Publication Date
JPS641122A true JPS641122A (en) 1989-01-05
JPH011122A JPH011122A (en) 1989-01-05

Family

ID=

Cited By (3)

* 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
US6785209B2 (en) 2000-01-06 2004-08-31 Samsung Electronics Co., Ltd. Optical pickup for improving properties of a reproduction signal
US6798731B1 (en) 2000-01-06 2004-09-28 Samsung Electronics Co., Ltd. Optical pickup for and method of correcting aberration due to thickness variations of optical media

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6069842A (en) * 1983-09-24 1985-04-20 Toshiba Corp Optical information reader

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6069842A (en) * 1983-09-24 1985-04-20 Toshiba Corp Optical information reader

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
US6785209B2 (en) 2000-01-06 2004-08-31 Samsung Electronics Co., Ltd. Optical pickup for improving properties of a reproduction signal
US6798731B1 (en) 2000-01-06 2004-09-28 Samsung Electronics Co., Ltd. Optical pickup for and method of correcting aberration due to thickness variations of optical media
US7092347B2 (en) 2000-01-06 2006-08-15 Samsung Electronics Co., Ltd. Optical pickup apparatus having disk thickness deviation correction and method therefor

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