JPH02140630U - - Google Patents
Info
- Publication number
- JPH02140630U JPH02140630U JP4804889U JP4804889U JPH02140630U JP H02140630 U JPH02140630 U JP H02140630U JP 4804889 U JP4804889 U JP 4804889U JP 4804889 U JP4804889 U JP 4804889U JP H02140630 U JPH02140630 U JP H02140630U
- Authority
- JP
- Japan
- Prior art keywords
- optical disk
- state
- objective lens
- inspection device
- moved
- 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 10
- 238000007689 inspection Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Optical Head (AREA)
Description
第１図は本考案に係る相変化型光デイスク用検
査装置の一実施例を示す要部構成図、第２図は動
作フロー、第３図は光学ヘツドのフオーカス・デ
フオーカス状態を示す図である。
１…光デイスク、２…スピンドルモータ、３…
光学ヘツド、４…制御回路、３１…対物レンズ、
３２…レンズアクチユエータ。
FIG. 1 is a block diagram of the main parts of an embodiment of the phase change optical disk inspection device according to the present invention, FIG. 2 is an operational flow, and FIG. 3 is a diagram showing the focus/defocus state of the optical head. . 1...Optical disk, 2...Spindle motor, 3...
Optical head, 4...control circuit, 31...objective lens,
32...Lens actuator.
Claims (1)
ヘツドの対物レンズを、少なくとも光デイスク面
に直角方向に近付けたり遠ざけたりするように移
動させることができ、消去時は対物レンズを移動
させてジヤスト・フオーカス状態からデフオーカ
ス状態にして消去用ビームを得るように構成した
ことを特徴とする相変化型光デイスク用検査装置
。 The objective lens of the optical head that emits the light beam to be irradiated onto the optical disk can be moved at least toward or away from the optical disk surface in a direction perpendicular to the surface of the optical disk, and when erasing, the objective lens is moved to directly focus. What is claimed is: 1. A phase-change optical disk inspection device characterized in that the phase-change optical disk inspection device is configured to obtain an erasing beam by changing the state from a defocused state to a defocus state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4804889U JPH02140630U (en) | 1989-04-24 | 1989-04-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4804889U JPH02140630U (en) | 1989-04-24 | 1989-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02140630U true JPH02140630U (en) | 1990-11-26 |
Family
ID=31564519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4804889U Pending JPH02140630U (en) | 1989-04-24 | 1989-04-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02140630U (en) |
-
1989
- 1989-04-24 JP JP4804889U patent/JPH02140630U/ja active Pending
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