FR2321164B1 - - Google Patents
Info
- Publication number
- FR2321164B1 FR2321164B1 FR7525163A FR7525163A FR2321164B1 FR 2321164 B1 FR2321164 B1 FR 2321164B1 FR 7525163 A FR7525163 A FR 7525163A FR 7525163 A FR7525163 A FR 7525163A FR 2321164 B1 FR2321164 B1 FR 2321164B1
- Authority
- FR
- France
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7525163A FR2321164A1 (fr) | 1975-08-13 | 1975-08-13 | Procede mecano-optique de diffusion de l'information, disque et dispositifs d'enregistrement et de lecture pour la mise en oeuvre de ce procede |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7525163A FR2321164A1 (fr) | 1975-08-13 | 1975-08-13 | Procede mecano-optique de diffusion de l'information, disque et dispositifs d'enregistrement et de lecture pour la mise en oeuvre de ce procede |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2321164A1 FR2321164A1 (fr) | 1977-03-11 |
FR2321164B1 true FR2321164B1 (no) | 1977-12-16 |
Family
ID=9159040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7525163A Granted FR2321164A1 (fr) | 1975-08-13 | 1975-08-13 | Procede mecano-optique de diffusion de l'information, disque et dispositifs d'enregistrement et de lecture pour la mise en oeuvre de ce procede |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2321164A1 (no) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56145535A (en) * | 1980-04-15 | 1981-11-12 | Matsushita Electric Ind Co Ltd | Disc for optical recording |
US4428075A (en) * | 1981-12-21 | 1984-01-24 | Burroughs Corporation | Methods of preformatting an optical disk |
US4428069A (en) * | 1981-12-21 | 1984-01-24 | Burroughs Corporation | Apparatus for preformatting an optical disk |
EP0100995A3 (en) * | 1982-08-10 | 1985-10-16 | Kabushiki Kaisha Toshiba | Optical disk |
US4480302A (en) * | 1982-09-29 | 1984-10-30 | Storage Technology Corporation | Optical recording media |
US4985881A (en) * | 1983-12-23 | 1991-01-15 | Hitachi, Ltd. | Record carrier for a magneto-optical disc memory having guide grooves of a plurality of tracks disposed with a predetermined relation to light spot diameter |
US4716560A (en) * | 1984-05-22 | 1987-12-29 | Victor Company Of Japan, Ltd. | Recording disc and method for fabricating same |
US4949331A (en) * | 1985-06-19 | 1990-08-14 | Hitachi, Ltd. | Apparatus and record carrier for optical disc memory with correction pattern and master disc cutting apparatus |
JPH0746429B2 (ja) * | 1985-06-21 | 1995-05-17 | オリンパス光学工業株式会社 | 光学式記録再生装置 |
US5144552A (en) * | 1986-07-25 | 1992-09-01 | Ricoh Company, Ltd. | Optical information storage medium having grooves and pits with specific depths, respectively |
US5432047A (en) * | 1992-06-12 | 1995-07-11 | International Business Machines Corporation | Patterning process for bipolar optical storage medium |
KR100433238B1 (ko) * | 1998-04-04 | 2004-09-16 | 엘지전자 주식회사 | 광디스크및마스터디스크제조방법및장치 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1967882A (en) * | 1929-08-01 | 1934-07-24 | Jr John Hays Hammond | Photo-electric system for recording and reproducing sound |
DE1927408C3 (de) * | 1969-01-23 | 1974-02-28 | Ted Bildplatten Ag Aeg-Telefunken-Teldec, Zug (Schweiz) | Vorrichtung zur Wiedergabe von gespeicherten Signalen |
US3800099A (en) * | 1971-03-31 | 1974-03-26 | Ted Bildplatten | Storing and reproducing information and carrier therefor with zones of different deformation characteristics |
NL7312139A (no) * | 1972-09-08 | 1974-03-12 | ||
IT1004391B (it) * | 1973-03-27 | 1976-07-10 | Ted Bildplatten | Procedimento e dispositivo per la fabbricazione di una guida nel sol co della registrazione di informa zioni di una spirale su un supporto di segnale a forma discoidale |
-
1975
- 1975-08-13 FR FR7525163A patent/FR2321164A1/fr active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2321164A1 (fr) | 1977-03-11 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |