JPS61161703U - - Google Patents
Info
- Publication number
- JPS61161703U JPS61161703U JP4671785U JP4671785U JPS61161703U JP S61161703 U JPS61161703 U JP S61161703U JP 4671785 U JP4671785 U JP 4671785U JP 4671785 U JP4671785 U JP 4671785U JP S61161703 U JPS61161703 U JP S61161703U
- Authority
- JP
- Japan
- Prior art keywords
- optical head
- disk
- automatic control
- control means
- measured
- 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
- 238000006073 displacement reaction Methods 0.000 claims 2
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Description
第１図は本考案の一実施例を示すブロツク構成
図。第２図は振れ量δの規格値と自動制御ループ
のゲイン特性を示す図。第３図は光デイスク・フ
アイル装置の基本構成を示す図。第４図は光学ヘ
ツドの概略を示す図。
１……アクチユエータ、２，４……比較器、３
……制御用プリアンプ、５……制御アンプ、６…
…センサアンプ、７，８……比較器、９……アン
ドゲート、３１……光デイスク、３２……モータ
、３３……光学ヘツド、３４……リニア・アクチ
ユエータ、４１……半導体レーザ、４２……レン
ズ系、４３……ハーフミラー、４４……光検出セ
ンサ、４５……案内溝。
FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a diagram showing the standard value of the runout amount δ and the gain characteristics of the automatic control loop. FIG. 3 is a diagram showing the basic configuration of an optical disk file device. FIG. 4 is a diagram schematically showing an optical head. 1... Actuator, 2, 4... Comparator, 3
...Control preamplifier, 5...Control amplifier, 6...
...Sensor amplifier, 7, 8...Comparator, 9...And gate, 31...Optical disk, 32...Motor, 33...Optical head, 34...Linear actuator, 41...Semiconductor laser, 42... ... Lens system, 43 ... Half mirror, 44 ... Light detection sensor, 45 ... Guide groove.
Claims (1)
測定デイスクの一点を光学的に照射しその反射光
を検出する光学ヘツドと を備え、 上記光学ヘツドには、被測定デイスクの回転に
伴い面振れまたは偏心による左右方向の振れに追
従するようにこの光学ヘツドの位置を制御する自
動制御手段を含み、 この自動制御手段のアクチユエータの変位に比
例する量が、被測定デイスクの回転に伴うデイス
クの面振れまたは偏心による左右方向の振れの測
定値として出力される手段を備えたデイスク形状
測定装置において、 上記自動制御手段の制御量が所定の上限値およ
び下限値の間にあることを監視する回路を備えた ことを特徴とするデイスク形状測定装置。[Claim for Utility Model Registration] The optical head is equipped with a motor that rotationally drives the disk to be measured, and an optical head that optically illuminates a point on the disk to be measured and detects the reflected light. The optical head includes an automatic control means for controlling the position of the optical head so as to follow horizontal deflection due to surface runout or eccentricity as the disk rotates, and an amount proportional to the displacement of the actuator of the automatic control means is determined by an amount proportional to the displacement of the actuator of the optical head. In a disk shape measuring device equipped with a means for outputting a measured value of surface runout of the disk due to rotation or horizontal runout due to eccentricity, the control amount of the automatic control means is between a predetermined upper limit value and a lower limit value. A disk shape measuring device characterized in that it is equipped with a circuit for monitoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4671785U JPH048327Y2 (en) | 1985-03-29 | 1985-03-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4671785U JPH048327Y2 (en) | 1985-03-29 | 1985-03-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61161703U true JPS61161703U (en) | 1986-10-07 |
| JPH048327Y2 JPH048327Y2 (en) | 1992-03-03 |
Family
ID=30561379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4671785U Expired JPH048327Y2 (en) | 1985-03-29 | 1985-03-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH048327Y2 (en) |
-
1985
- 1985-03-29 JP JP4671785U patent/JPH048327Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH048327Y2 (en) | 1992-03-03 |
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