JPS62174209U - - Google Patents
Info
- Publication number
- JPS62174209U JPS62174209U JP6277186U JP6277186U JPS62174209U JP S62174209 U JPS62174209 U JP S62174209U JP 6277186 U JP6277186 U JP 6277186U JP 6277186 U JP6277186 U JP 6277186U JP S62174209 U JPS62174209 U JP S62174209U
- Authority
- JP
- Japan
- Prior art keywords
- optical disk
- light
- condenser lens
- amount
- segment sensor
- 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 9
- 238000007689 inspection Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims 2
- 238000005259 measurement Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Transform (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Length Measuring Devices By Optical Means (AREA)
Description
第１図および第２図は本考案の光デイスク検査
装置の一実施例を示す構成図、第３図および第４
図は本願出願人がすでに出願している光デイスク
検査装置の一例を示す構成図である。
１……集光レンズ、２……遮光板、３……窓部
、４……光源、５……多分割センサ、６……光ス
ポツト、７……光源駆動回路、８……光電変換回
路、９……測定回路、１０……加算回路、１１…
…差動増幅器。
1 and 2 are block diagrams showing an embodiment of the optical disk inspection device of the present invention, and FIGS.
The figure is a configuration diagram showing an example of an optical disk inspection device that has already been filed by the applicant of the present invention. DESCRIPTION OF SYMBOLS 1... Condenser lens, 2... Light shielding plate, 3... Window part, 4... Light source, 5... Multi-segment sensor, 6... Light spot, 7... Light source drive circuit, 8... Photoelectric conversion circuit , 9... Measuring circuit, 10... Adding circuit, 11...
...Differential amplifier.
Claims (1)
びフオーカスサーボをかけ光ヘツドを光デイスク
の動きに追従させるとともにこの時の集光レンズ
の変位量を検出して光デイスクにおける偏心およ
びフレの大きさを測定するようにした光デイスク
検査装置において、長方形の窓部を有し前記集光
レンズにおけるトラツキング方向およびフオーカ
ス方向を含む平面上に配置されるとともにこの集
光レンズに固定された遮光板と、この遮光板に対
して前記窓部の移動範囲より大きなスポツト径を
有する平行光線を照射する光源と、前記遮光板の
窓部を通過した光を検出する多分割センサと、こ
の多分割センサの出力信号を演算して前記集光レ
ンズの変位量に応じた信号を発生する測定回路と
、前記多分割センサにおける各受光面からの出力
信号の総和を検出してこれが常に一定の値となる
ように前記光源の発光量を制御する帰還回路とを
具備してなる光デイスク検査装置。 A tracking servo and a focus servo are applied to the guide groove of the optical disk to make the optical head follow the movement of the optical disk, and the amount of displacement of the condenser lens at this time is detected to measure the amount of eccentricity and deflection in the optical disk. In the optical disk inspection apparatus, the light shielding plate has a rectangular window portion, is arranged on a plane including the tracking direction and the focusing direction of the condenser lens, and is fixed to the condenser lens; A light source that irradiates the plate with parallel light beams having a spot diameter larger than the moving range of the window, a multi-segment sensor that detects the light that has passed through the window of the light-shielding plate, and an output signal of the multi-segment sensor. a measurement circuit that calculates and generates a signal according to the amount of displacement of the condenser lens; and a measurement circuit that detects the sum of output signals from each light receiving surface of the multi-segment sensor and controls the light source so that the sum always remains a constant value An optical disk inspection device comprising: a feedback circuit for controlling the amount of light emitted by the optical disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6277186U JPH0419454Y2 (en) | 1986-04-25 | 1986-04-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6277186U JPH0419454Y2 (en) | 1986-04-25 | 1986-04-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62174209U true JPS62174209U (en) | 1987-11-05 |
| JPH0419454Y2 JPH0419454Y2 (en) | 1992-05-01 |
Family
ID=30897366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6277186U Expired JPH0419454Y2 (en) | 1986-04-25 | 1986-04-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0419454Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04109103A (en) * | 1990-08-28 | 1992-04-10 | Sharp Corp | Light spot position detecting device |
| JP2004503762A (en) * | 2000-06-15 | 2004-02-05 | スカンラブ アーゲー | Position detector for scanning devices |
-
1986
- 1986-04-25 JP JP6277186U patent/JPH0419454Y2/ja not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04109103A (en) * | 1990-08-28 | 1992-04-10 | Sharp Corp | Light spot position detecting device |
| JP2004503762A (en) * | 2000-06-15 | 2004-02-05 | スカンラブ アーゲー | Position detector for scanning devices |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0419454Y2 (en) | 1992-05-01 |
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