JPS62173046U - - Google Patents
Info
- Publication number
- JPS62173046U JPS62173046U JP6160686U JP6160686U JPS62173046U JP S62173046 U JPS62173046 U JP S62173046U JP 6160686 U JP6160686 U JP 6160686U JP 6160686 U JP6160686 U JP 6160686U JP S62173046 U JPS62173046 U JP S62173046U
- Authority
- JP
- Japan
- Prior art keywords
- scratch
- optical disk
- measuring device
- reference level
- readout 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 description 7
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
- Manufacturing Optical Record Carriers (AREA)
Description
第１図は本考案の光デイスクのキズ測定装置の
一実施例を示す構成図、第２図はその動作状態を
示す波形図、第３図は本考案の光デイスクのキズ
測定装置の他の実施例を示す構成図、第４図は従
来の光デイスクのキズ測定装置の一例を示す構成
図、第５図はその動作状態を示す波形図である。
１……光デイスク、２……測定ヘツド、３，３
１，３２……比較回路、４……キズパルス分析器
、５……オア回路。
Fig. 1 is a configuration diagram showing one embodiment of the optical disk scratch measuring device of the present invention, Fig. 2 is a waveform diagram showing its operating state, and Fig. 3 is another example of the optical disk scratch measuring device of the present invention. FIG. 4 is a block diagram showing an example of a conventional optical disk scratch measuring device, and FIG. 5 is a waveform diagram showing its operating state. 1... Optical disk, 2... Measuring head, 3, 3
1, 32... Comparison circuit, 4... Scratch pulse analyzer, 5... OR circuit.
Claims (1)
定の基準レベルと比較し読出し信号のレベル変化
からキズの有無を検出するようにした光デイスク
のキズ測定装置において、前記基準レベルを前記
読出し信号の平均値に対して高い値に設定してな
る光デイスクのキズ測定装置。 In an optical disk scratch measuring device that compares a readout signal proportional to the reflectance of the optical disk with a certain reference level and detects the presence or absence of a scratch from a change in the level of the readout signal, the reference level is defined as the average of the readout signals. An optical disc scratch measuring device that is set to a higher value than the original value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6160686U JPS62173046U (en) | 1986-04-23 | 1986-04-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6160686U JPS62173046U (en) | 1986-04-23 | 1986-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62173046U true JPS62173046U (en) | 1987-11-04 |
Family
ID=30895093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6160686U Pending JPS62173046U (en) | 1986-04-23 | 1986-04-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62173046U (en) |
-
1986
- 1986-04-23 JP JP6160686U patent/JPS62173046U/ja active Pending
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