JPH0328523U - - Google Patents
Info
- Publication number
- JPH0328523U JPH0328523U JP8824589U JP8824589U JPH0328523U JP H0328523 U JPH0328523 U JP H0328523U JP 8824589 U JP8824589 U JP 8824589U JP 8824589 U JP8824589 U JP 8824589U JP H0328523 U JPH0328523 U JP H0328523U
- Authority
- JP
- Japan
- Prior art keywords
- reproduction
- signal
- recording
- spot
- erasing
- 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 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案に係わる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図は記録スポ
ツトと再生スポツトの位置関係を示す図、第３図
は記録マークの形成過程を示す図、第４図は記録
マークの形成位置の測定例を示す図、第５図は消
去スポツトと再生スポツトの位置関係を示す図、
第６図は記録マークと再生信号の関係を示す図、
第７図は記録マークの消去過程を示す図である。
１……再生／記録／消去コントローラ、２……
スポツト間隔コントローラ、３……２ビームヘツ
ド、４……記録／消去用レーザダイオード駆動回
路、５……再生用レーザダイオード駆動回路、６
……光デイスク、７……増幅器、８……信号処理
回路、９……計算機、３１……記録／消去用レー
ザダイオード、３２……再生用レーザダイオード
、３３，３４……ビームスプリツタ、３５……対
物レンズ、３６……再生用フオートダイオード、
８１……信号振幅測定回路、８２……位相差測定
回路。
FIG. 1 is a block diagram showing an embodiment of an optical disk test system according to the present invention, FIG. 2 is a diagram showing the positional relationship between a recording spot and a reproducing spot, and FIG. 3 is a diagram showing the process of forming recording marks. FIG. 4 is a diagram showing an example of measuring the formation position of a recording mark, and FIG. 5 is a diagram showing the positional relationship between the erasing spot and the reproducing spot.
Figure 6 is a diagram showing the relationship between recording marks and reproduction signals;
FIG. 7 is a diagram showing the process of erasing recorded marks. 1... Play/record/erase controller, 2...
Spot spacing controller, 3...2 beam head, 4...recording/erasing laser diode drive circuit, 5...reproduction laser diode drive circuit, 6
... Optical disk, 7 ... Amplifier, 8 ... Signal processing circuit, 9 ... Computer, 31 ... Recording/erasing laser diode, 32 ... Reproducing laser diode, 33, 34 ... Beam splitter, 35 ...Objective lens, 36...Photo diode for reproduction,
81... Signal amplitude measurement circuit, 82... Phase difference measurement circuit.
Claims (1)
再生／記録／消去コントローラと、 前記記録パルス信号又は消去パルス信号に同期
して、記録消去用レーザダイオードから記録パル
ス又は消去パルスを出射させる記録／消去用レー
ザダイオード駆動回路と、 再生用レーザダイオードから再生パルスを出射
させる再生用レーザダイオード駆動回路と、 前記２つのレーザダイオードからの出射光をそ
れぞれビームスプリツタを介して対物レンズで合
成させ、記録／消去スポツト及び再生スポツトと
して、それぞれ光デイスク上に集光させる２ビー
ムヘツドと、 この２ビームヘツドに入力され、前記２つのス
ポツト間隔を制御するスポツト間隔制御信号を出
力するスポツト間隔コントローラと、 前記再生スポツトからの反射光を検出し、電気
信号に変換し、増幅する再生用フオトダイオード
及び増幅器と、 この増幅器の出力信号及び前記記録パルス信号
が入力され、再生信号振幅及び再生信号と記録パ
ルス信号の位相差を出力する信号処理回路と、 この信号処理回路の出力及び前記スポツト間隔
制御信号が入力され、前記２つのコントローラを
制御する制御信号を出力すると共に、記録／消去
過程及び記録マーク形成位置を測定する計算機と
を備えた構成とした事を特徴とする光デイスクテ
ストシステム。[Claims for Utility Model Registration] A reproduction/recording/erase controller that outputs a recording pulse signal or an erasing pulse signal; and a recording pulse or erasing pulse from a recording and erasing laser diode in synchronization with the recording pulse signal or erasing pulse signal. a recording/erasing laser diode drive circuit that emits a reproduction pulse; a reproduction laser diode drive circuit that emits a reproduction pulse from a reproduction laser diode; and a reproduction laser diode drive circuit that transmits the output light from the two laser diodes to an objective lens through a beam splitter. a two-beam head that combines the two beams and focuses them on the optical disk as a recording/erasing spot and a reproducing spot, respectively; and a spot spacing controller that outputs a spot spacing control signal that is input to the two beam heads and controls the spacing between the two spots. a reproduction photodiode and an amplifier that detect the reflected light from the reproduction spot, convert it into an electric signal, and amplify it; and the output signal of this amplifier and the recording pulse signal are input, and the reproduction signal amplitude and the reproduction signal are input. a signal processing circuit that outputs a phase difference between recording pulse signals; the output of this signal processing circuit and the spot interval control signal are input; the output of the signal processing circuit and the spot interval control signal are input; An optical disk test system characterized by comprising a computer for measuring mark formation positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8824589U JP2501870Y2 (en) | 1989-07-27 | 1989-07-27 | Optical disc test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8824589U JP2501870Y2 (en) | 1989-07-27 | 1989-07-27 | Optical disc test system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0328523U true JPH0328523U (en) | 1991-03-22 |
| JP2501870Y2 JP2501870Y2 (en) | 1996-06-19 |
Family
ID=31637869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8824589U Expired - Lifetime JP2501870Y2 (en) | 1989-07-27 | 1989-07-27 | Optical disc test system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2501870Y2 (en) |
-
1989
- 1989-07-27 JP JP8824589U patent/JP2501870Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2501870Y2 (en) | 1996-06-19 |
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