JPS6148423U - - Google Patents
Info
- Publication number
- JPS6148423U JPS6148423U JP13370884U JP13370884U JPS6148423U JP S6148423 U JPS6148423 U JP S6148423U JP 13370884 U JP13370884 U JP 13370884U JP 13370884 U JP13370884 U JP 13370884U JP S6148423 U JPS6148423 U JP S6148423U
- Authority
- JP
- Japan
- Prior art keywords
- error signal
- tracking error
- circuit
- spot
- disk
- 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 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案のトラツキング制御系の構成を
示すブロツク図、第２図及び第３図は従来のトラ
ツキング制御系の構成を示すブロツク図、第４図
はその説明図を各々表す。
１……トラツク、２……デイスク、３，７，８
……ビームスポツト、４……対物レンズ、５，９
，１０……受光素子、６……演算回路、１１……
差動増幅器、１３……スイツチ、１４……切換制
御回路、１５……判定回路。
FIG. 1 is a block diagram showing the configuration of a tracking control system according to the present invention, FIGS. 2 and 3 are block diagrams showing the configuration of a conventional tracking control system, and FIG. 4 is an explanatory diagram thereof. 1...Truck, 2...Disk, 3,7,8
...beam spot, 4...objective lens, 5,9
, 10... Light receiving element, 6... Arithmetic circuit, 11...
Differential amplifier, 13... switch, 14... switching control circuit, 15... determination circuit.
Claims (1)
るようにビームスポツトの位置をトラツキング制
御しつつ情報を記録再生する光学的情報記録再生
装置であつて、該ビームスポツトは少なくとも該
トラツクの略々中央を追従する第１のスポツトと
、該第１のスポツトの斜め左右前後に該トラツク
の左右の側縁を追従するように配置された第２及
び第３のスポツトとからなり、該第１のスポツト
から得られる信号に基いてトラツキングエラー信
号を生成する第１の回路と、該第２及び第３のス
ポツトから得られる信号に基いてトラツキングエ
ラー信号を生成する第２の回路とを備え、該第１
の回路より得られるトラツキングエラー信号と該
第２の回路より得られるトラツキングエラー信号
とを択一的に選択してトラツキング制御すること
を特徴とする光学的情報記録再生装置。 (2) 該トラツキングエラー信号は該デイスクの
半径方向における該スポツトの位置に対応して切
り換えられることを特徴とする実用新案登録請求
の範囲第１項の光学的情報記録再生装置。 (3) 該デイスクが比較的小径であるとき該第１
の回路からのトラツキングエラー信号が、又該デ
イスクが比較的大径であるとき該第２の回路から
のトラツキングエラー信号が各々選択されること
を特徴とする実用新案登録請求の範囲第１項の光
学的情報記録再生装置。[Claims for Utility Model Registration] (1) An optical information recording and reproducing device that records and reproduces information while tracking and controlling the position of a beam spot so as to follow a track formed on a disk, which includes at least a first spot that follows approximately the center of the track, and second and third spots that are arranged diagonally left and right, front and back of the first spot so as to follow the left and right side edges of the track. a first circuit that generates a tracking error signal based on the signal obtained from the first spot; and a tracking error signal that generates the tracking error signal based on the signal obtained from the second and third spots. a second circuit;
An optical information recording/reproducing apparatus characterized in that tracking control is performed by selectively selecting a tracking error signal obtained from the second circuit and a tracking error signal obtained from the second circuit. (2) The optical information recording and reproducing apparatus according to claim 1, wherein the tracking error signal is switched in accordance with the position of the spot in the radial direction of the disk. (3) When the disk has a relatively small diameter, the first
The tracking error signal from the second circuit is selected, and the tracking error signal from the second circuit is selected when the disk has a relatively large diameter. Optical information recording and reproducing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13370884U JPS6148423U (en) | 1984-09-03 | 1984-09-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13370884U JPS6148423U (en) | 1984-09-03 | 1984-09-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6148423U true JPS6148423U (en) | 1986-04-01 |
Family
ID=30692244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13370884U Pending JPS6148423U (en) | 1984-09-03 | 1984-09-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6148423U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5737750A (en) * | 1980-08-19 | 1982-03-02 | Olympus Optical Co Ltd | Automatic tracking system |
-
1984
- 1984-09-03 JP JP13370884U patent/JPS6148423U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5737750A (en) * | 1980-08-19 | 1982-03-02 | Olympus Optical Co Ltd | Automatic tracking system |
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