JPS62164620U - - Google Patents
Info
- Publication number
- JPS62164620U JPS62164620U JP5177786U JP5177786U JPS62164620U JP S62164620 U JPS62164620 U JP S62164620U JP 5177786 U JP5177786 U JP 5177786U JP 5177786 U JP5177786 U JP 5177786U JP S62164620 U JPS62164620 U JP S62164620U
- Authority
- JP
- Japan
- Prior art keywords
- disks
- center hole
- radial grooves
- glass master
- glass
- 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
- 239000011521 glass Substances 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000015654 memory Effects 0.000 claims 1
Landscapes
- Manufacturing Optical Record Carriers (AREA)
Description
第１図は、本考案の光デイスク製造用ガラス原
盤の実施例を示す断面斜視図、第２図は第１図の
平面図、第３図は第２図のＡ―Ａ断面図、第４図
は従来のガラス原盤の縦断面図である。
１……ガラス原盤、２……中心穴、３……溝、
４……トンネル。
FIG. 1 is a cross-sectional perspective view showing an embodiment of the glass master disk for manufacturing optical disks of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a sectional view taken along line AA in FIG. The figure is a longitudinal cross-sectional view of a conventional glass master disk. 1...Glass master disc, 2...Center hole, 3...Groove,
4...Tunnel.
Claims (1)
クのマスタリングに使用するガラス原盤において
、中心穴を有し、前記中心穴が円錐台形をなし、
前記円錐台の大なる底面部から最外周まで続く半
円形断面の複数の放射状溝を有する同一のガラス
円盤２枚を前記放射状溝が重なり合つて円形断面
トンネルを形成するように接合したことを特徴と
する光デイスク製造用ガラス原盤。 A glass master disk used for mastering optical disks such as compact disks and optical memories has a center hole, and the center hole has a truncated conical shape,
It is characterized in that two identical glass disks each having a plurality of radial grooves with a semicircular cross section extending from the large base of the truncated cone to the outermost circumference are joined together so that the radial grooves overlap to form a circular cross-section tunnel. Glass master disc for manufacturing optical disks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5177786U JPS62164620U (en) | 1986-04-07 | 1986-04-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5177786U JPS62164620U (en) | 1986-04-07 | 1986-04-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62164620U true JPS62164620U (en) | 1987-10-19 |
Family
ID=30876352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5177786U Pending JPS62164620U (en) | 1986-04-07 | 1986-04-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62164620U (en) |
-
1986
- 1986-04-07 JP JP5177786U patent/JPS62164620U/ja active Pending