JPH03102111U - - Google Patents
Info
- Publication number
- JPH03102111U JPH03102111U JP1035190U JP1035190U JPH03102111U JP H03102111 U JPH03102111 U JP H03102111U JP 1035190 U JP1035190 U JP 1035190U JP 1035190 U JP1035190 U JP 1035190U JP H03102111 U JPH03102111 U JP H03102111U
- Authority
- JP
- Japan
- Prior art keywords
- period
- movement
- actuator
- optical disk
- predetermined
- 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
- 230000003287 optical effect Effects 0.000 claims description 11
- 230000001678 irradiating effect Effects 0.000 claims 2
- 230000003252 repetitive effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
Landscapes
- Optical Recording Or Reproduction (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Manufacturing Optical Record Carriers (AREA)
Description
第１図は本考案装置の一実施例を示す構成図で
あり、第２図はヒステリシス回路の動作説明図で
あり、第３図は本考案の装置の動作の説明に供す
る図である。
１……相変化型光デイスク、２……回転軸、３
……アクチユエータ、３２……対物レンズ、３３
……駆動コイル、３４……レーザー、３５……４
分割デイテクタ、３６……変位検出器、３７……
対物レンズホルダー、４……トラツキングエラー
検出回路、５……スイツチ、６……対物レンズ駆
動回路、７……変位検出回路、８……ヒステリシ
ス回路、９……制御回路、１０，１３，１５，１
６，……Ｄ／Ａ変換器、１１……モータ制御回路
、１２……スピンドルモータ、１４……レーザー
駆動回路、１７……ポテンシオメータ、１８……
フイーダ制御回路、１９……フイーダ、２０……
／Ｄ変換器。
FIG. 1 is a block diagram showing one embodiment of the device of the present invention, FIG. 2 is a diagram for explaining the operation of a hysteresis circuit, and FIG. 3 is a diagram for explaining the operation of the device of the present invention. 1... Phase change optical disk, 2... Rotating shaft, 3
...Actuator, 3 2 ...Objective lens, 3 3
...Drive coil, 3 4 ...Laser, 3 5 ...4
Divided detector, 3 6 ... Displacement detector, 3 7 ...
Objective lens holder, 4... Tracking error detection circuit, 5... Switch, 6... Objective lens drive circuit, 7... Displacement detection circuit, 8... Hysteresis circuit, 9... Control circuit, 10, 13, 15 ,1
6,... D/A converter, 11... Motor control circuit, 12... Spindle motor, 14... Laser drive circuit, 17... Potentiometer, 18...
Feeder control circuit, 19...Feeder, 20...
/D converter.
Claims (1)
スクを回転した状態で所定のスポツト径のレーザ
ー収束光を照射して初期化処理を行う相変化型光
デイスクの初期化装置であり、 装着された前記光デイスクの半径方向に移動可
能なアクチユエータと、 前記アクチユエータにより、該アクチユエータ
の所定位置に対して前記半径方向に変位可能に保
持された対物レンズと、 前記対物レンズが、前記光デイスクの回転周期
に比例する第１の期間で所定の移動幅だけ前記半
径方向の一方に略一定の速度で移動し、続く所定
の第２の期間で復帰する連続した反復移動を行う
ようこれを駆動する対物レンズ駆動手段と、 前記アクチユエータが、前記第２の期間の始ま
りと同時に、前記対物レンズの移動幅よりも短い
所定の距離だけ前記半径方向の一方に移動すべく
移動を開始し、前記第１の期間より十分短い移動
期間でその移動を略終了するように逐次駆動する
アクチユエータ駆動手段とを有し、 前記第２の期間が前記移動期間に略一致するよ
うにしたことを特徴とする相変化型光デイスクの
初期化装置。 (2) 相変化型の光デイスクを装着し、該光デイ
スクを回転した状態で所定のスポツト径のレーザ
ー収束光を照射して初期化処理を行う相変化型光
デイスクの初期化装置であり、 装着された前記光デイスクの半径方向に移動可
能なアクチユエータと、 前記アクチユエータにより、該アクチユエータ
の所定位置に対して前記半径方向に変位可能に保
持された対物レンズと、 前記対物レンズが、前記光デイスクの回転周期
に比例する第１の期間で所定の移動幅だけ前記半
径方向の一方に略一定の速度で移動し、続く所定
の第２の期間で復帰する連続した反復移動を行う
ようこれを駆動する対物レンズ駆動手段と、 前記アクチユエータが、前記第２の期間の始ま
りと同時に、前記対物レンズの移動幅よりも短い
所定の距離だけ前記半径方向の一方に移動すべく
移動を開始し、前記第１の期間より十分短い移動
期間でその移動を略終了するように逐次駆動する
アクチユエータ駆動手段と、 前記第２の期間における前記レーザー収束光の
エネルギーが、前記第１の期間における前記レー
ザー収束光のエネルギーより小さくなるようにレ
ーザーを制御するレーザー駆動手段とを有し、 前記第２の期間が前記移動期間に略一致するよ
うにしたことを特徴とする相変化型光デイスクの
初期化装置。[Scope of Claim for Utility Model Registration] (1) A phase change type optical disc that is equipped with a phase change type optical disk and performs initialization processing by irradiating a focused laser beam with a predetermined spot diameter while rotating the optical disk. a disk initialization device, an actuator movable in the radial direction of the attached optical disk; an objective lens held by the actuator so as to be displaceable in the radial direction with respect to a predetermined position of the actuator; The objective lens moves in one direction in the radial direction at a substantially constant speed by a predetermined movement width in a first period proportional to the rotation period of the optical disk, and returns in a subsequent predetermined second period. objective lens drive means for driving it to perform repetitive movements; and said actuator is moved in one of said radial directions by a predetermined distance shorter than the movement width of said objective lens simultaneously with the beginning of said second period. actuator drive means that sequentially drives the actuator so that the movement starts and substantially ends the movement in a sufficiently shorter movement period than the first period, and the second period substantially coincides with the movement period. An initialization device for a phase change optical disk, characterized in that: (2) An initialization device for a phase change type optical disk, which performs initialization processing by irradiating a phase change type optical disk with focused laser light having a predetermined spot diameter while rotating the optical disk; an actuator movable in the radial direction of the attached optical disk; an objective lens held by the actuator so as to be displaceable in the radial direction with respect to a predetermined position of the actuator; is driven to perform a continuous repetitive movement in which it moves at a substantially constant speed in one of the radial directions by a predetermined movement width in a first period proportional to the rotation period of the radial direction, and returns in a subsequent predetermined second period. the actuator starts moving in one of the radial directions by a predetermined distance shorter than a movement width of the objective lens at the same time as the start of the second period; an actuator driving means that sequentially drives the movement so as to substantially complete its movement in a sufficiently shorter movement period than the first period; and a laser driving means for controlling the laser so that the laser energy is smaller than the energy, and the second period is made to substantially coincide with the movement period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1035190U JPH082809Y2 (en) | 1990-02-05 | 1990-02-05 | Phase change optical disk initialization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1035190U JPH082809Y2 (en) | 1990-02-05 | 1990-02-05 | Phase change optical disk initialization device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03102111U true JPH03102111U (en) | 1991-10-24 |
| JPH082809Y2 JPH082809Y2 (en) | 1996-01-29 |
Family
ID=31513923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1035190U Expired - Lifetime JPH082809Y2 (en) | 1990-02-05 | 1990-02-05 | Phase change optical disk initialization device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH082809Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007252362A (en) * | 2006-01-20 | 2007-10-04 | Ryuzo Tsukamoto | Catching equipment for dog excrement etc. |
-
1990
- 1990-02-05 JP JP1035190U patent/JPH082809Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007252362A (en) * | 2006-01-20 | 2007-10-04 | Ryuzo Tsukamoto | Catching equipment for dog excrement etc. |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH082809Y2 (en) | 1996-01-29 |
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