JPH0458819U - - Google Patents
Info
- Publication number
- JPH0458819U JPH0458819U JP1990101336U JP10133690U JPH0458819U JP H0458819 U JPH0458819 U JP H0458819U JP 1990101336 U JP1990101336 U JP 1990101336U JP 10133690 U JP10133690 U JP 10133690U JP H0458819 U JPH0458819 U JP H0458819U
- Authority
- JP
- Japan
- Prior art keywords
- value
- wavelength
- optical disk
- refractive index
- disk substrate
- 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 description 7
- 239000000758 substrate Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
第１図は本考案に係る光デイスクの部分断面概
念図、第２図は再生光とピツトとの関係を示す図
、第３図はピツトの深さと戻り光量の関係を示す
図、第４図は広く採用されているピツトの断面図
である。
１……光デイスク、２……基板、３……ピツト
。
FIG. 1 is a partial cross-sectional conceptual diagram of an optical disk according to the present invention, FIG. 2 is a diagram showing the relationship between the reproduction light and the pit, FIG. 3 is a diagram showing the relationship between the depth of the pit and the amount of returned light, and FIG. is a cross-sectional view of a widely used pit. 1...Optical disk, 2...Substrate, 3...Pits.
Claims (1)
波長の1/4の値を更に光デイスク基板の屈折率で
割つて第１の値とし、第２の波長の1/4の値を更
に光デイスク基板の屈折率で割つて第２の値とし
、これら第１の値と第２の値との中間の値に相当
する深さのピツトで情報を記録したことを特徴と
した光デイスク。 (2) 異なる２つの波長の光を対象とし、第１の
波長の1/4の値を更に光デイスク基板の屈折率で
割つて第１の値とし、第２の波長の1/4の値を更
に光デイスク基板の屈折率で割つて第２の値とし
、ピツトの深さと第１の値との差を第１の波長で
割つて得た値を第３の値とし、ピツトの深さと第
２の値との差を第２の波長で割つて得た値を第４
の値とし、前記第３の値と第４の値とがほぼ等し
くなるように深さが定められたピツトで情報を記
録したことを特徴とした光デイスク。[Claims for Utility Model Registration] (1) Light of two different wavelengths is the target, and the value of 1/4 of the first wavelength is further divided by the refractive index of the optical disk substrate to obtain the first value, and the second value is The value of 1/4 of the wavelength of is further divided by the refractive index of the optical disk substrate to obtain a second value, and information is stored in pits with a depth corresponding to an intermediate value between the first value and the second value. An optical disc characterized by recording. (2) For light of two different wavelengths, the value of 1/4 of the first wavelength is further divided by the refractive index of the optical disk substrate to obtain the first value, and the value of 1/4 of the second wavelength is determined. is further divided by the refractive index of the optical disk substrate to obtain a second value, and the difference between the pit depth and the first value is divided by the first wavelength to obtain a third value, and the pit depth and The value obtained by dividing the difference from the second value by the second wavelength is the fourth value.
, and information is recorded in pits whose depths are set so that the third value and the fourth value are approximately equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990101336U JP2541033Y2 (en) | 1990-09-27 | 1990-09-27 | optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990101336U JP2541033Y2 (en) | 1990-09-27 | 1990-09-27 | optical disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0458819U true JPH0458819U (en) | 1992-05-20 |
| JP2541033Y2 JP2541033Y2 (en) | 1997-07-09 |
Family
ID=31844704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990101336U Expired - Fee Related JP2541033Y2 (en) | 1990-09-27 | 1990-09-27 | optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2541033Y2 (en) |
-
1990
- 1990-09-27 JP JP1990101336U patent/JP2541033Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2541033Y2 (en) | 1997-07-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |