JPS61140440U - - Google Patents
Info
- Publication number
- JPS61140440U JPS61140440U JP1985025120U JP2512085U JPS61140440U JP S61140440 U JPS61140440 U JP S61140440U JP 1985025120 U JP1985025120 U JP 1985025120U JP 2512085 U JP2512085 U JP 2512085U JP S61140440 U JPS61140440 U JP S61140440U
- Authority
- JP
- Japan
- Prior art keywords
- disc
- information recording
- shaped optical
- recording carrier
- optical information
- 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 9
- 238000010586 diagram Methods 0.000 description 7
- 238000007689 inspection Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Recording Or Reproduction (AREA)
- Manufacturing Optical Record Carriers (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985025120U JPS61140440U (hu) | 1985-02-22 | 1985-02-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985025120U JPS61140440U (hu) | 1985-02-22 | 1985-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61140440U true JPS61140440U (hu) | 1986-08-30 |
Family
ID=30519910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985025120U Pending JPS61140440U (hu) | 1985-02-22 | 1985-02-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61140440U (hu) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5265404A (en) * | 1975-11-26 | 1977-05-30 | Matsushita Electric Ind Co Ltd | Information recording original disk being furnished with pattern for d etecting focus position |
| JPS58161160A (ja) * | 1982-03-19 | 1983-09-24 | Hitachi Ltd | 光デイスクおよび装置 |
| JPS58169354A (ja) * | 1982-03-31 | 1983-10-05 | Hitachi Ltd | 情報記録円板 |
-
1985
- 1985-02-22 JP JP1985025120U patent/JPS61140440U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5265404A (en) * | 1975-11-26 | 1977-05-30 | Matsushita Electric Ind Co Ltd | Information recording original disk being furnished with pattern for d etecting focus position |
| JPS58161160A (ja) * | 1982-03-19 | 1983-09-24 | Hitachi Ltd | 光デイスクおよび装置 |
| JPS58169354A (ja) * | 1982-03-31 | 1983-10-05 | Hitachi Ltd | 情報記録円板 |
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