JPH01154513U - - Google Patents
Info
- Publication number
- JPH01154513U JPH01154513U JP4918988U JP4918988U JPH01154513U JP H01154513 U JPH01154513 U JP H01154513U JP 4918988 U JP4918988 U JP 4918988U JP 4918988 U JP4918988 U JP 4918988U JP H01154513 U JPH01154513 U JP H01154513U
- Authority
- JP
- Japan
- Prior art keywords
- wavelength
- pregroove
- optical disk
- pits
- optical
- 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 12
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
第１図は本考案の一実施例による光デイスクを
示す略線図、第２図はその光デイスク装置を示す
ブロツク図、第３図はその動作の説明に供する信
号波形図、第４図、第５図及び第６図は光デイス
クの詳細な構成を示す斜視図、第７図は従来の光
デイスクを示す略線図である。
１，５……光デイスク、２，１２……プリグル
ーブ、３……ピツト、Ｄ，Ｄ０，Ｄ１，Ｄ−１…
…光デイテクタ。
FIG. 1 is a schematic diagram showing an optical disk according to an embodiment of the present invention, FIG. 2 is a block diagram showing the optical disk device, FIG. 3 is a signal waveform diagram for explaining its operation, and FIG. 5 and 6 are perspective views showing the detailed structure of an optical disk, and FIG. 7 is a schematic diagram showing a conventional optical disk. 1, 5...Optical disk, 2, 12...Pregroove, 3...Pit, D, D0 , D1 , D -1 ...
...Optical detector.
Claims (1)
深さ又は高さでなるピツトを光記録媒体の所定方
向に離散的に形成してなる記録トラツクと、上記
光ビームの波長に対して略１／８波長の深さ又は
高さでなり、上記記録トラツクに沿つて、上記所
定方向と直交する方向に蛇行してなるプリグルー
ブとを形成した光デイスクから記録情報を得るよ
うになされた光デイスク装置において、 上記ピツト及び上記プリグルーブに、それぞれ
上記光ビームを照射して、上記ピツトから得られ
る反射光に基づいて上記記録トラツクから記録情
報を得ると共に、上記プリグルーブから得られる
反射光を、上記所定方向と直行する方向に２分割
した光デイテクタで受光し、上記光デイテクタの
出力信号の差信号に基づいて上記プリグルーブか
ら記録情報を得るようにした、 ことを特徴とする光デイスク装置。[Claims for Utility Model Registration] A recording track formed by discretely forming pits in a predetermined direction of an optical recording medium, each having a depth or height of approximately 1/4 wavelength with respect to the wavelength of a predetermined light beam; from an optical disk having a pregroove having a depth or height approximately 1/8 wavelength of the wavelength of the light beam and meandering along the recording track in a direction perpendicular to the predetermined direction; In an optical disk device configured to obtain recorded information, the pits and the pregrooves are irradiated with the light beams, and the recorded information is obtained from the recording track based on the reflected light obtained from the pits; The reflected light obtained from the pregroove is received by an optical detector divided into two in a direction perpendicular to the predetermined direction, and recording information is obtained from the pregroove based on a difference signal between the output signals of the optical detector. An optical disk device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4918988U JPH01154513U (en) | 1988-04-12 | 1988-04-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4918988U JPH01154513U (en) | 1988-04-12 | 1988-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01154513U true JPH01154513U (en) | 1989-10-24 |
Family
ID=31275305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4918988U Pending JPH01154513U (en) | 1988-04-12 | 1988-04-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01154513U (en) |
-
1988
- 1988-04-12 JP JP4918988U patent/JPH01154513U/ja active Pending
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