JPS60169723U - optical disc player - Google Patents
optical disc playerInfo
- Publication number
- JPS60169723U JPS60169723U JP5645984U JP5645984U JPS60169723U JP S60169723 U JPS60169723 U JP S60169723U JP 5645984 U JP5645984 U JP 5645984U JP 5645984 U JP5645984 U JP 5645984U JP S60169723 U JPS60169723 U JP S60169723U
- Authority
- JP
- Japan
- Prior art keywords
- detection circuit
- optical
- time difference
- disc player
- optical head
- 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
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は光学式ＤＡＤプレーヤの原理説明図、第２図は
トラックずれの説明図、第３図は受光素子出力回路の構
成図、第４図は時間差検出回路の構成図、第５図はその
タイムチャート、第６図は本考案の一実施例を示すブロ
ック図、第７図は時間フィルタの詳細図、第８図は実施
例のタイムチャートである。・
図中、１はディスク、２はレーザ、３は４分割受光素子
、６はレンズ、１１はピット、１２はトラック、３０は
光学ヘッド、３２は時間差検出回路、３３は時間フィル
タ、３４は位相補償回路、３５はアクチュエータドライ
バ、３６はトラッキングアクチュエータコイルである。
数品
■−−≧
第５図Fig. 1 is an explanatory diagram of the principle of an optical DAD player, Fig. 2 is an explanatory diagram of track deviation, Fig. 3 is a configuration diagram of the light receiving element output circuit, Fig. 4 is a configuration diagram of the time difference detection circuit, and Fig. 5 is FIG. 6 is a block diagram showing an embodiment of the present invention, FIG. 7 is a detailed diagram of the time filter, and FIG. 8 is a time chart of the embodiment. - In the figure, 1 is a disk, 2 is a laser, 3 is a 4-split light receiving element, 6 is a lens, 11 is a pit, 12 is a track, 30 is an optical head, 32 is a time difference detection circuit, 33 is a time filter, and 34 is a phase A compensation circuit, 35 is an actuator driver, and 36 is a tracking actuator coil. Several items■−−≧ Figure 5
Claims (1)
光を受光素子で受光する光学ヘッドと、・ 該受光
素子を４分割して同一ピットに対する各部の受光出力の
時間差から該光学ヘッドの光軸と該ディスクのトラック
との位置すれを検出する時間差検出回路と、該検出回路
の時間差に応じた出力パルスに基づき該光学ヘッドの光
軸を該トラックの中心部に修正するサーボ系とを有する
光学式ディスクプレーヤにおいて、該時間差検出回路の
後段に、該検出回路出力のパルス幅の上限を一定値に規
制する時間フィルタを設けたことを特徴とする光学式デ
ィスプレーヤ。An optical head that irradiates a rotating optical disk surface with a light beam and receives the reflected light with a light receiving element; - The light receiving element is divided into four parts, and the optical axis of the optical head is determined from the time difference in the light reception output of each part for the same pit. and a servo system that corrects the optical axis of the optical head to the center of the track based on an output pulse corresponding to the time difference of the detection circuit. What is claimed is: 1. An optical disc player characterized in that a time filter is provided downstream of the time difference detection circuit to regulate the upper limit of the pulse width of the detection circuit output to a constant value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5645984U JPS60169723U (en) | 1984-04-17 | 1984-04-17 | optical disc player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5645984U JPS60169723U (en) | 1984-04-17 | 1984-04-17 | optical disc player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60169723U true JPS60169723U (en) | 1985-11-11 |
| JPH0248981Y2 JPH0248981Y2 (en) | 1990-12-21 |
Family
ID=30580070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5645984U Granted JPS60169723U (en) | 1984-04-17 | 1984-04-17 | optical disc player |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60169723U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6346629A (en) * | 1986-08-13 | 1988-02-27 | Fujitsu Ten Ltd | Optical disk reproducing device |
| JPH0384911U (en) * | 1989-12-21 | 1991-08-28 | ||
| JPH04295631A (en) * | 1991-03-25 | 1992-10-20 | Alpine Electron Inc | Optical disc player |
-
1984
- 1984-04-17 JP JP5645984U patent/JPS60169723U/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6346629A (en) * | 1986-08-13 | 1988-02-27 | Fujitsu Ten Ltd | Optical disk reproducing device |
| JPH0384911U (en) * | 1989-12-21 | 1991-08-28 | ||
| JPH04295631A (en) * | 1991-03-25 | 1992-10-20 | Alpine Electron Inc | Optical disc player |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0248981Y2 (en) | 1990-12-21 |
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