FR2129626A5 - - Google Patents
Info
- Publication number
- FR2129626A5 FR2129626A5 FR7208626A FR7208626A FR2129626A5 FR 2129626 A5 FR2129626 A5 FR 2129626A5 FR 7208626 A FR7208626 A FR 7208626A FR 7208626 A FR7208626 A FR 7208626A FR 2129626 A5 FR2129626 A5 FR 2129626A5
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/7605—Television signal recording on discs or drums
-
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
-
- 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
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
-
- 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
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
-
- 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
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24085—Pits
-
- 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
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Testing Of Coins (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7103233A NL7103233A (en) | 1971-03-11 | 1971-03-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2129626A5 true FR2129626A5 (en) | 1972-10-27 |
Family
ID=19812661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7208626A Expired FR2129626A5 (en) | 1971-03-11 | 1972-03-13 |
Country Status (13)
Country | Link |
---|---|
JP (1) | JPS5213733B1 (en) |
BE (1) | BE780451A (en) |
CA (1) | CA953419A (en) |
CH (1) | CH558053A (en) |
DK (1) | DK133449B (en) |
ES (2) | ES400596A1 (en) |
FR (1) | FR2129626A5 (en) |
GB (1) | GB1387304A (en) |
IT (1) | IT952934B (en) |
NL (1) | NL7103233A (en) |
NO (1) | NO138162C (en) |
SE (1) | SE396493B (en) |
ZA (1) | ZA72928B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2396378A1 (en) * | 1977-06-28 | 1979-01-26 | Ibm | VIDEO RECORDING DISC AND PLAYBACK WITH APPLICATION |
FR2422220A1 (en) * | 1978-04-03 | 1979-11-02 | Philips Nv | RECORD HOLDER WITH A PHASE STRUCTURE TO BE READ OPTICALLY AND DEVICE FOR READING |
FR2442487A2 (en) * | 1978-11-21 | 1980-06-20 | Thomson Brandt | Automatic focussing for optical reading of video disc - using electromagnetic assembly with windings to control lens position |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0665950U (en) * | 1991-07-22 | 1994-09-16 | 勉 宮崎 | Optical reader |
FR2750528A1 (en) * | 1996-06-28 | 1998-01-02 | Thomson Multimedia Sa | OPTICAL DISC COMPATIBLE WITH TWO DIFFERENT READING SYSTEMS |
-
1971
- 1971-03-11 NL NL7103233A patent/NL7103233A/xx unknown
-
1972
- 1972-02-14 ZA ZA720928A patent/ZA72928B/en unknown
- 1972-03-08 DK DK107272AA patent/DK133449B/en not_active IP Right Cessation
- 1972-03-08 JP JP47023275A patent/JPS5213733B1/ja active Pending
- 1972-03-08 CA CA136,517A patent/CA953419A/en not_active Expired
- 1972-03-08 GB GB1079172A patent/GB1387304A/en not_active Expired
- 1972-03-08 SE SE7202924A patent/SE396493B/en unknown
- 1972-03-08 CH CH336872A patent/CH558053A/en not_active IP Right Cessation
- 1972-03-08 NO NO740/72A patent/NO138162C/en unknown
- 1972-03-08 IT IT67733/72A patent/IT952934B/en active
- 1972-03-09 BE BE780451A patent/BE780451A/en not_active IP Right Cessation
- 1972-03-09 ES ES400596A patent/ES400596A1/en not_active Expired
- 1972-03-13 FR FR7208626A patent/FR2129626A5/fr not_active Expired
-
1974
- 1974-07-01 ES ES427857A patent/ES427857A1/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2396378A1 (en) * | 1977-06-28 | 1979-01-26 | Ibm | VIDEO RECORDING DISC AND PLAYBACK WITH APPLICATION |
FR2422220A1 (en) * | 1978-04-03 | 1979-11-02 | Philips Nv | RECORD HOLDER WITH A PHASE STRUCTURE TO BE READ OPTICALLY AND DEVICE FOR READING |
FR2442487A2 (en) * | 1978-11-21 | 1980-06-20 | Thomson Brandt | Automatic focussing for optical reading of video disc - using electromagnetic assembly with windings to control lens position |
Also Published As
Publication number | Publication date |
---|---|
DK133449C (en) | 1977-03-14 |
CH558053A (en) | 1975-01-15 |
IT952934B (en) | 1973-07-30 |
SE396493B (en) | 1977-09-19 |
BE780451A (en) | 1972-09-11 |
NO138162B (en) | 1978-04-03 |
ZA72928B (en) | 1973-09-26 |
NO138162C (en) | 1978-07-12 |
ES427857A1 (en) | 1977-07-01 |
GB1387304A (en) | 1975-03-12 |
DE2209761B2 (en) | 1976-02-12 |
DK133449B (en) | 1976-05-17 |
ES400596A1 (en) | 1975-07-16 |
DE2209761A1 (en) | 1972-09-21 |
NL7103233A (en) | 1972-09-13 |
JPS5213733B1 (en) | 1977-04-16 |
CA953419A (en) | 1974-08-20 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |