JPS62187418U - - Google Patents
Info
- Publication number
- JPS62187418U JPS62187418U JP7448886U JP7448886U JPS62187418U JP S62187418 U JPS62187418 U JP S62187418U JP 7448886 U JP7448886 U JP 7448886U JP 7448886 U JP7448886 U JP 7448886U JP S62187418 U JPS62187418 U JP S62187418U
- Authority
- JP
- Japan
- Prior art keywords
- light
- disk
- reading device
- receiving elements
- light receiving
- 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
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案に係る情報読取装置の概略構造
図、第２図は読取つた信号のタイムチヤート、第
３図はスライスレベルを変化させて情報を読取る
場合の説明図、第４図は従来及び本考案に係る情
報読取装置の信号のＳ／Ｎ比を比較した特性曲線
図、第５図及び第６図は従来の情報読取装置の概
略構造図及びピツトの反射光を受光した信号の波
形図である。
１０…光デイスク、１１…トラツク、１３Ａ，
１３Ｂ…第１、第２の受光素子、１４…差動増幅
器、Ｐ１，Ｐ２…ピツト。
Fig. 1 is a schematic structural diagram of the information reading device according to the present invention, Fig. 2 is a time chart of the read signal, Fig. 3 is an explanatory diagram when reading information by changing the slice level, and Fig. 4 is the conventional one. and a characteristic curve diagram comparing the S/N ratio of the signal of the information reading device according to the present invention, and FIGS. 5 and 6 are schematic structural diagrams of the conventional information reading device and the waveform of the signal that received the reflected light from the pit. It is a diagram. 10... Optical disk, 11... Track, 13A,
13B...first and second light receiving elements, 14...differential amplifier, P1 , P2 ...pits.
Claims (1)
出することによりデイスクに記録された情報を読
取る信号読取装置において、 デイスクのトラツク長方向に並設してあり、デ
イスクからの反射光又は透過光を受光する２つの
受光素子と、前記両受光素子の信号を夫々入力す
る差動増幅器とを備えることを特徴とする情報読
取装置。[Scope of Claim for Utility Model Registration] A signal reading device that reads information recorded on a disk by irradiating a light beam and detecting the reflected light or transmitted light, which are arranged in parallel in the track length direction of the disk, An information reading device comprising two light receiving elements that receive reflected light or transmitted light from a disk, and a differential amplifier that inputs signals from both of the light receiving elements, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7448886U JPS62187418U (en) | 1986-05-16 | 1986-05-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7448886U JPS62187418U (en) | 1986-05-16 | 1986-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62187418U true JPS62187418U (en) | 1987-11-28 |
Family
ID=30919748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7448886U Pending JPS62187418U (en) | 1986-05-16 | 1986-05-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62187418U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59132430A (en) * | 1983-12-12 | 1984-07-30 | Hitachi Ltd | Information reproducing device |
-
1986
- 1986-05-16 JP JP7448886U patent/JPS62187418U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59132430A (en) * | 1983-12-12 | 1984-07-30 | Hitachi Ltd | Information reproducing device |
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