JPH0426414U - - Google Patents
Info
- Publication number
- JPH0426414U JPH0426414U JP6362690U JP6362690U JPH0426414U JP H0426414 U JPH0426414 U JP H0426414U JP 6362690 U JP6362690 U JP 6362690U JP 6362690 U JP6362690 U JP 6362690U JP H0426414 U JPH0426414 U JP H0426414U
- Authority
- JP
- Japan
- Prior art keywords
- optical
- generating means
- signal
- signal generating
- optical detector
- 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 7
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図は、本考案の光記録再生装置に採用され
るフオーカスサーボ装置の概要図、第２図は波長
検出用の光デイテクタの特性を示すグラフ、第３
図はサンプルサーボピツト形式の光磁気デイスク
のフオーマツトの説明図、第４図はサンプルサー
ボピツトの説明図である。
図中、１５はフオーカスコイル、１７はフオー
カスエラー検出用の再生光デイテクタ、２０はフ
オーカスエラーの演算回路、２１は増幅器、１８
Ａ，１８Ｂは波長変動検出用の第１、第２の光デ
イテクタ、２４は差動アンプを示す。
FIG. 1 is a schematic diagram of the focus servo device employed in the optical recording/reproducing apparatus of the present invention, FIG. 2 is a graph showing the characteristics of the optical detector for wavelength detection, and FIG.
The figure is an explanatory diagram of the format of a sample servo pit type magneto-optical disk, and FIG. 4 is an explanatory diagram of the sample servopit. In the figure, 15 is a focus coil, 17 is a reproduction light detector for detecting focus errors, 20 is a focus error calculation circuit, 21 is an amplifier, and 18
A and 18B are first and second optical detectors for detecting wavelength fluctuations, and 24 is a differential amplifier.
Claims (1)
出する光デイテクタと、前記光デイテクタより検
出された波長変動に対応する信号を形成する信号
発生手段と、該信号発生手段の出力をフオーカス
サーボ回路にオフセツト信号として注入する回路
手段を備えていることを特徴とする光記録再生装
置。 an optical detector for detecting wavelength fluctuations of a laser beam irradiated onto an optical disk; a signal generating means for forming a signal corresponding to the wavelength fluctuation detected by the optical detector; and an output of the signal generating means to a focus servo circuit. An optical recording/reproducing device characterized by comprising circuit means for injecting as an offset signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6362690U JPH0426414U (en) | 1990-06-18 | 1990-06-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6362690U JPH0426414U (en) | 1990-06-18 | 1990-06-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0426414U true JPH0426414U (en) | 1992-03-03 |
Family
ID=31593848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6362690U Pending JPH0426414U (en) | 1990-06-18 | 1990-06-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0426414U (en) |
-
1990
- 1990-06-18 JP JP6362690U patent/JPH0426414U/ja active Pending
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