JPS641122A - Crosstalk eliminating circuit in optical reproducing device - Google Patents
Crosstalk eliminating circuit in optical reproducing deviceInfo
- 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
Links
Landscapes
- 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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6069842A (en) * | 1983-09-24 | 1985-04-20 | Toshiba Corp | Optical information reader |
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6069842A (en) * | 1983-09-24 | 1985-04-20 | Toshiba Corp | Optical information reader |
Cited By (4)
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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