JPH0185913U - - Google Patents
Info
- Publication number
- JPH0185913U JPH0185913U JP18065287U JP18065287U JPH0185913U JP H0185913 U JPH0185913 U JP H0185913U JP 18065287 U JP18065287 U JP 18065287U JP 18065287 U JP18065287 U JP 18065287U JP H0185913 U JPH0185913 U JP H0185913U
- Authority
- JP
- Japan
- Prior art keywords
- crosstalk
- optical disk
- removal device
- tracks
- adjacent
- 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
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Description
第１図及び第３図は夫々本考案の光デイスクの
クロストーク除去装置の第１、第２実施例のブロ
ツク図、第２図は本考案装置が適用される再生装
置の信号再生説明用原理図である。
１，２……クロストーク除去装置、Ａ１〜Ａ３
……増幅器、Ｂ１〜Ｂ３……光ビーム（光点）、
Ｃ１〜Ｃ３……加算器、Ｄ……光デイスク、Ｄ１
〜Ｄ３……受光ダイオード、Ｉｎ１〜Ｉｎ３……
入力端子、Ｊ１〜Ｊ３……クロストーク成分検出
器、Ｋ１〜Ｋ４……係数付加器、Ｌ……対物レン
ズ、ＬＤ１〜ＬＤ３……レーザーダイオード、Ｍ
……ハーフミラー、Ｔ０〜Ｔ４……記録トラツク
、△Ｔ１〜△Ｔ３……遅延回路。
1 and 3 are block diagrams of the first and second embodiments of the optical disk crosstalk removal device of the present invention, respectively, and FIG. 2 is an explanatory principle of signal reproduction of a reproducing device to which the device of the present invention is applied. It is a diagram. 1, 2...Crosstalk removal device, A1 to A3
...Amplifier, B1 to B3 ...Light beam (light spot),
C1 to C3 ... Adder, D... Optical disk, D1
~ D3 ... Light receiving diode, In1 ~ In3 ...
Input terminal, J1 to J3 ...Crosstalk component detector, K1 to K4 ...Coefficient adder, L...Objective lens, LD1 to LD3 ...Laser diode, M
. . . half mirror, T 0 to T 4 . . . recording track, ΔT 1 to ΔT 3 . . . delay circuit.
Claims (1)
ームを同時に照射し、その反射光を光電変換して
複数の再生信号を同時に得るよう構成された再生
装置に適用されるクロストーク除去装置であつて
、各再生信号チヤンネル毎に隣接トラツクからの
クロストーク成分の混入量に応じた量の隣接信号
成分を得て、これを減算することによりクロスト
ークの低減された再生信号を得るよう構成したこ
とを特徴とする光デイスクのクロストーク除去装
置。 (2) 複数のトラツクは記録時に同時形成された
ものであり、異時に光ビームを照射される隣接ト
ラツクとは互いにクロストークが生じない程度以
上に離間して形成された光デイスクの各トラツク
の信号再生時に生じるクロストークを減衰するよ
う構成された実用新案登録請求の範囲第１項記載
の光デイスクのクロストーク除去装置。[Claims for Utility Model Registration] (1) Applicable to a playback device configured to simultaneously irradiate multiple tracks of an optical disk with multiple light beams and photoelectrically convert the reflected light to obtain multiple playback signals at the same time. This is a crosstalk removal device that reduces crosstalk by obtaining an amount of adjacent signal components corresponding to the amount of crosstalk components mixed in from adjacent tracks for each reproduced signal channel and subtracting this. A crosstalk removal device for an optical disk, characterized in that it is configured to obtain a reproduced signal. (2) Multiple tracks are formed at the same time during recording, and each track on the optical disk is formed at a distance that does not cause crosstalk from adjacent tracks that are irradiated with light beams at different times. An optical disc crosstalk removal device according to claim 1, which is configured to attenuate crosstalk that occurs during signal reproduction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18065287U JPH0185913U (en) | 1987-11-27 | 1987-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18065287U JPH0185913U (en) | 1987-11-27 | 1987-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0185913U true JPH0185913U (en) | 1989-06-07 |
Family
ID=31472162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18065287U Pending JPH0185913U (en) | 1987-11-27 | 1987-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0185913U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5758248A (en) * | 1980-09-24 | 1982-04-07 | Nec Corp | Readout method of high density light beam |
| JPS6161236A (en) * | 1984-09-03 | 1986-03-29 | Hitachi Ltd | Optical disk reproducing device |
-
1987
- 1987-11-27 JP JP18065287U patent/JPH0185913U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5758248A (en) * | 1980-09-24 | 1982-04-07 | Nec Corp | Readout method of high density light beam |
| JPS6161236A (en) * | 1984-09-03 | 1986-03-29 | Hitachi Ltd | Optical disk reproducing device |
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