JPH0255451U - - Google Patents
Info
- Publication number
- JPH0255451U JPH0255451U JP13338488U JP13338488U JPH0255451U JP H0255451 U JPH0255451 U JP H0255451U JP 13338488 U JP13338488 U JP 13338488U JP 13338488 U JP13338488 U JP 13338488U JP H0255451 U JPH0255451 U JP H0255451U
- Authority
- JP
- Japan
- Prior art keywords
- reflectance
- disks
- optical disk
- track
- cross signal
- 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 2
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図はその要部を示すブロツク図、第３図はそ
の動作を示す各部波形図である。
２１…デイスク検出器、２２…エンベロープ検
出器、２３…ピーク検出器、２４…コンパレータ
、２９…ローパスフイルタ。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing the main parts thereof, and FIG. 3 is a waveform diagram of each part showing its operation. 21...Disk detector, 22...Envelope detector, 23...Peak detector, 24...Comparator, 29...Low pass filter.
Claims (1)
る光デイスク装置において、トラツククロス信号
を得る手段と、該トラツククロス信号により情報
が記録された各トラツクの反射率と上記各トラツ
ク間の反射率とを比較することにより、異種のデ
イスクを判別することを特徴とする光デイスク装
置。 In an optical disk device that records or reproduces information by irradiating light onto a disk, there is provided a means for obtaining a track cross signal, a reflectance of each track on which information is recorded by the track cross signal, and a reflectance between the respective tracks. An optical disk device characterized in that different types of disks are discriminated by comparing the two types of disks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13338488U JPH0255451U (en) | 1988-10-14 | 1988-10-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13338488U JPH0255451U (en) | 1988-10-14 | 1988-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0255451U true JPH0255451U (en) | 1990-04-20 |
Family
ID=31391194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13338488U Pending JPH0255451U (en) | 1988-10-14 | 1988-10-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0255451U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63103471A (en) * | 1986-10-20 | 1988-05-09 | Fujitsu General Ltd | Optical disk discriminating circuit for compatible optical disk device |
-
1988
- 1988-10-14 JP JP13338488U patent/JPH0255451U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63103471A (en) * | 1986-10-20 | 1988-05-09 | Fujitsu General Ltd | Optical disk discriminating circuit for compatible optical disk device |