JPH0420623U - - Google Patents
Info
- Publication number
- JPH0420623U JPH0420623U JP6144190U JP6144190U JPH0420623U JP H0420623 U JPH0420623 U JP H0420623U JP 6144190 U JP6144190 U JP 6144190U JP 6144190 U JP6144190 U JP 6144190U JP H0420623 U JPH0420623 U JP H0420623U
- Authority
- JP
- Japan
- Prior art keywords
- optical disk
- magnetic head
- waveform
- recording
- magnetic field
- 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 15
- 238000005259 measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000005381 magnetic domain Effects 0.000 description 1
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Description
第１図は本考案の光デイスクテストシステムの
一実施例を示す構成図、第２図は第１図装置を用
いて測定した磁界反転に対する記録磁区及び再生
信号を示す図、第３図は従来例である。
１……光デイスクドライブ装置、３……計算機
、４……波形発生器、５……磁気ヘツド駆動アン
プ、６……測定器、１１……磁気ヘツド、１２…
…光デイスク、１３……光ヘツド。
Fig. 1 is a block diagram showing an embodiment of the optical disk test system of the present invention, Fig. 2 is a diagram showing recording magnetic domains and reproduction signals for magnetic field reversal measured using the apparatus shown in Fig. 1, and Fig. 3 is a diagram showing the conventional optical disk test system. This is an example. DESCRIPTION OF SYMBOLS 1... Optical disk drive device, 3... Computer, 4... Waveform generator, 5... Magnetic head drive amplifier, 6... Measuring instrument, 11... Magnetic head, 12...
...Optical disk, 13...Optical head.
Claims (1)
れ、記録磁界を前記光デイスクに印加する磁気ヘ
ツドを備えた光デイスクドライブ装置と、 この光デイスクドライブ装置と接続され、前記
光デイスクの記録・再生を行うための測定パラメ
ータを設定する計算機と、 この計算機から波形制御信号が入力され、磁気
ヘツド駆動波形を出力する波形発生器と、 この波形発生器からの磁気ヘツド駆動波形に応
じて、磁界反転を可能とする磁気ヘツド電流を前
記磁気ヘツドに供給する磁気ヘツド駆動アンプと
、 前記光ヘツドからの再生信号が入力される測定
器と を設けた構成であつて、前記波形発生器の出力波
形である磁気ヘツド駆動波形により、前記磁気ヘ
ツドの磁界反転時間を任意に制御して、前記光デ
イスクの磁界変調記録における記録・再生特性を
測定するようにしたことを特徴とする光デイスク
テストシステム。[Claims for Utility Model Registration] An optical disk drive device including a magnetic head that is installed on the opposite side of the optical disk to the optical head and applies a recording magnetic field to the optical disk; and an optical disk drive device that is connected to the optical disk drive device. , a computer for setting measurement parameters for recording and reproducing the optical disk; a waveform generator to which a waveform control signal is input from the computer and outputs a magnetic head drive waveform; and a waveform generator for outputting a magnetic head drive waveform from the waveform generator. The configuration includes a magnetic head drive amplifier that supplies a magnetic head current that enables magnetic field reversal to the magnetic head according to a drive waveform, and a measuring device into which a reproduced signal from the optical head is input, The magnetic head drive waveform, which is the output waveform of the waveform generator, is used to arbitrarily control the magnetic field reversal time of the magnetic head to measure the recording/reproducing characteristics in magnetic field modulation recording of the optical disk. optical disk test system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6144190U JPH0420623U (en) | 1990-06-11 | 1990-06-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6144190U JPH0420623U (en) | 1990-06-11 | 1990-06-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0420623U true JPH0420623U (en) | 1992-02-20 |
Family
ID=31589694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6144190U Pending JPH0420623U (en) | 1990-06-11 | 1990-06-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0420623U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3039725U (en) * | 1996-11-05 | 1997-07-31 | 重夫 磯谷 | Bookstand with a tray for small items |
-
1990
- 1990-06-11 JP JP6144190U patent/JPH0420623U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3039725U (en) * | 1996-11-05 | 1997-07-31 | 重夫 磯谷 | Bookstand with a tray for small items |
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