JPS6449145A - Optical recording medium and reading method thereof - Google Patents
Optical recording medium and reading method thereofInfo
- Publication number
- JPS6449145A JPS6449145A JP62205555A JP20555587A JPS6449145A JP S6449145 A JPS6449145 A JP S6449145A JP 62205555 A JP62205555 A JP 62205555A JP 20555587 A JP20555587 A JP 20555587A JP S6449145 A JPS6449145 A JP S6449145A
- Authority
- JP
- Japan
- Prior art keywords
- light
- pits
- slopes
- recording
- recording part
- 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
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To enable exact signal reading by forming slopes on both sides of tracks in the case of reading the information of recording tracks by reflection of laser light. CONSTITUTION:The projection light from a laser light source is condensed onto an aluminum reflecting film 8 of a recording medium 6. The light focused to the recording part 1 of the reflecting film 8 is reflected to arrive at a photodetector via a beam splitter unless there are pits. The light is diffracted and is prevented from arriving at the photodetector if there are the pits. The information of the medium 6 can, therefore, be read by the presence or absence of the pits. The parts except the recording part 11 in this constitution form the groove parts consisting of the slopes 12, 13. The light projected to the slopes 12, 13 is scattered and is prevented from returning to an objective lens 3. The disturbance in the various intensity levels of the reflected light is, therefore, obviated even if the projection area except the recording part 11 is increased. The exact signal reading is thereby executed regardless of the tracking accuracy.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62205555A JPS6449145A (en) | 1987-08-19 | 1987-08-19 | Optical recording medium and reading method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62205555A JPS6449145A (en) | 1987-08-19 | 1987-08-19 | Optical recording medium and reading method thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6449145A true JPS6449145A (en) | 1989-02-23 |
Family
ID=16508830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62205555A Pending JPS6449145A (en) | 1987-08-19 | 1987-08-19 | Optical recording medium and reading method thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6449145A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0322224A (en) * | 1989-03-24 | 1991-01-30 | Fuji Photo Film Co Ltd | Optical information recording method and information recording medium |
-
1987
- 1987-08-19 JP JP62205555A patent/JPS6449145A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0322224A (en) * | 1989-03-24 | 1991-01-30 | Fuji Photo Film Co Ltd | Optical information recording method and information recording medium |
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