JPS6322660U - - Google Patents
Info
- Publication number
- JPS6322660U JPS6322660U JP1986113993U JP11399386U JPS6322660U JP S6322660 U JPS6322660 U JP S6322660U JP 1986113993 U JP1986113993 U JP 1986113993U JP 11399386 U JP11399386 U JP 11399386U JP S6322660 U JPS6322660 U JP S6322660U
- Authority
- JP
- Japan
- Prior art keywords
- disc
- base material
- disc base
- information recording
- recording layer
- 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
- 239000000463 material Substances 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
第１図は、この考案の一実施例による光デイス
クの正面図、第２図は従来の光デイスクの正面図
である。図において、１はデイスク基材、１ａは
情報記録層、１ｂは中心穴、３は第１の円板、４
は第２の円板である。なお各図中同一符号は同一
又は相当部分を示す。
FIG. 1 is a front view of an optical disk according to an embodiment of this invention, and FIG. 2 is a front view of a conventional optical disk. In the figure, 1 is a disk base material, 1a is an information recording layer, 1b is a center hole, 3 is a first disk, 4
is the second disk. Note that the same reference numerals in each figure indicate the same or equivalent parts.
Claims (1)
スク基材のほぼ中心部に所定の径の磁性体からな
る第１の円板を配置されたものにおいて、上記デ
イスク基材と上記円板との間に熱膨張係数が上記
デイスク基材の熱膨張係数とほぼ同一な第２の円
板を配置したことを特徴とする光デイスク。 In a disc base material having an information recording layer in a predetermined area in the radial direction, a first disc made of a magnetic material having a predetermined diameter is arranged approximately at the center, and the disc base material and the disc An optical disc characterized in that a second disc having a thermal expansion coefficient substantially the same as that of the disc base material is disposed between the discs.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986113993U JPS6322660U (en) | 1986-07-22 | 1986-07-22 | |
| KR1019880700296A KR910008504B1 (en) | 1986-07-22 | 1987-05-28 | Optical disk |
| US07/168,125 US4877667A (en) | 1986-07-22 | 1987-05-28 | Optical disc with inhibited thermal distortion |
| EP87903433A EP0277235B1 (en) | 1986-07-22 | 1987-05-28 | Optical disc |
| DE8787903433T DE3783353D1 (en) | 1986-07-22 | 1987-05-28 | OPTICAL DISK. |
| PCT/JP1987/000343 WO1988000755A1 (en) | 1986-07-22 | 1987-05-28 | Optical disc |
| CN87105175A CN1007187B (en) | 1986-07-22 | 1987-07-21 | Optical disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986113993U JPS6322660U (en) | 1986-07-22 | 1986-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6322660U true JPS6322660U (en) | 1988-02-15 |
Family
ID=30996317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986113993U Pending JPS6322660U (en) | 1986-07-22 | 1986-07-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6322660U (en) |
-
1986
- 1986-07-22 JP JP1986113993U patent/JPS6322660U/ja active Pending