JPH025120U - - Google Patents
Info
- Publication number
- JPH025120U JPH025120U JP1988079926U JP7992688U JPH025120U JP H025120 U JPH025120 U JP H025120U JP 1988079926 U JP1988079926 U JP 1988079926U JP 7992688 U JP7992688 U JP 7992688U JP H025120 U JPH025120 U JP H025120U
- Authority
- JP
- Japan
- Prior art keywords
- guide grooves
- substrate
- recording medium
- optical recording
- lands
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims 2
- 239000000758 substrate Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Description
第１図は本考案の一実施例を示す概略斜視図、
第２図及び第３図は変形例を示す概略斜視図、第
４図は本実施例方式のサンプルＡについての再生
信号特性図、第５図は従来方式のサンプルＢにつ
いての再生信号特性図である。
１……基板、２……案内溝、３……ランド部、
４……情報トラツク、５……凹凸ピツト、６……
プリフオーマツト、７……凹み、８……追記フラ
グ。
FIG. 1 is a schematic perspective view showing an embodiment of the present invention;
2 and 3 are schematic perspective views showing modified examples, FIG. 4 is a reproduction signal characteristic diagram for sample A of the present embodiment method, and FIG. 5 is a reproduction signal characteristic diagram for sample B of the conventional method. be. 1... Board, 2... Guide groove, 3... Land portion,
4... Information track, 5... Uneven pit, 6...
Preformat, 7...dent, 8...additional flag.
Claims (1)
グ用案内溝を形成し、これらの案内溝自体又は各
案内溝間のランド部を情報トラツクとし、各情報
トラツク上の少なくとも一部に凹凸ピツトによる
プリフオーマツトを形成した基板を設け、この基
板上に光吸収反射性を有する記録膜を形成した光
記録媒体において、前記基板のプリフオーマツト
形成部中の追記フラグ書込み領域に連続的又は不
連続的な凹みを予め形成したことを特徴とする光
記録媒体。 A plurality of tracking guide grooves are formed in parallel, concentric circles, or spirally, these guide grooves themselves or lands between the guide grooves are used as information tracks, and at least a part of each information track is preformed with uneven pits. In an optical recording medium in which a recording film having light absorbing and reflecting properties is formed on the substrate, continuous or discontinuous depressions are formed in advance in the write-once flag writing area in the preformat forming part of the substrate. An optical recording medium characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988079926U JP2543287Y2 (en) | 1988-06-16 | 1988-06-16 | Optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988079926U JP2543287Y2 (en) | 1988-06-16 | 1988-06-16 | Optical recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH025120U true JPH025120U (en) | 1990-01-12 |
| JP2543287Y2 JP2543287Y2 (en) | 1997-08-06 |
Family
ID=31304772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988079926U Expired - Lifetime JP2543287Y2 (en) | 1988-06-16 | 1988-06-16 | Optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2543287Y2 (en) |
-
1988
- 1988-06-16 JP JP1988079926U patent/JP2543287Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2543287Y2 (en) | 1997-08-06 |
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