FR2069448A5 - - Google Patents
Info
- Publication number
- FR2069448A5 FR2069448A5 FR7040862A FR7040862A FR2069448A5 FR 2069448 A5 FR2069448 A5 FR 2069448A5 FR 7040862 A FR7040862 A FR 7040862A FR 7040862 A FR7040862 A FR 7040862A FR 2069448 A5 FR2069448 A5 FR 2069448A5
- 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
- G11B7/08—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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691958858 DE1958858C3 (de) | 1969-11-15 | Einrichtung zur Lichtabtastung eines Trägers mit Rillen |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2069448A5 true FR2069448A5 (it) | 1971-09-03 |
Family
ID=5751873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7040862A Expired FR2069448A5 (it) | 1969-11-15 | 1970-11-13 |
Country Status (4)
Country | Link |
---|---|
US (1) | US3764759A (it) |
JP (1) | JPS4917046B1 (it) |
FR (1) | FR2069448A5 (it) |
GB (1) | GB1285108A (it) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4010317A (en) * | 1972-03-29 | 1977-03-01 | U.S. Philips Corporation | Apparatus for reading a record carrier in which information, for example video and/or audio information, is recorded in at least one track |
FR2197495A5 (it) * | 1972-08-25 | 1974-03-22 | Thomson Csf | |
NL161284C (nl) * | 1972-09-02 | 1980-01-15 | Philips Nv | Weergavestelsel voor een optisch uitleesbare informatie- structuur, alsmede registratiedrager voor gebruik daarin. |
US3919562A (en) * | 1974-05-20 | 1975-11-11 | Zenith Radio Corp | Slit detector for optical detector system |
JPS57125245U (it) * | 1981-01-30 | 1982-08-04 | ||
US4534021A (en) * | 1981-12-10 | 1985-08-06 | Discovision Associates | Angularly multiplexed optical recording medium |
US5161134A (en) * | 1989-06-29 | 1992-11-03 | Digital Equipment Corporation | Method for increasing linear bit density in magneto-optical storage media |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB304848A (en) * | 1927-10-31 | 1929-01-31 | Brenchley Ernest George Mittel | Improvements in or relating to sound recording |
US1917003A (en) * | 1929-01-21 | 1933-07-04 | Columbia Phono Graph Company I | Reproduction of sound records |
US1956626A (en) * | 1931-03-14 | 1934-05-01 | Percy A Robbins | Translucent sound record |
US2497142A (en) * | 1941-12-18 | 1950-02-14 | Shepherd Judson O'd | Sound recorder and reproducer |
-
1970
- 1970-11-13 FR FR7040862A patent/FR2069448A5/fr not_active Expired
- 1970-11-13 JP JP45100103A patent/JPS4917046B1/ja active Pending
- 1970-11-13 GB GB54233/70A patent/GB1285108A/en not_active Expired
- 1970-11-16 US US00089692A patent/US3764759A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB1285108A (en) | 1972-08-09 |
US3764759A (en) | 1973-10-09 |
DE1958858B2 (de) | 1976-03-04 |
JPS4917046B1 (it) | 1974-04-26 |
DE1958858A1 (de) | 1971-06-03 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property | ||
ST | Notification of lapse |