DK133449C - - Google Patents
Info
- Publication number
- DK133449C DK133449C DK107272A DK107272A DK133449C DK 133449 C DK133449 C DK 133449C DK 107272 A DK107272 A DK 107272A DK 107272 A DK107272 A DK 107272A DK 133449 C DK133449 C DK 133449C
- Authority
- DK
- Denmark
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
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- 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)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
- Testing Of Coins (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7103233A NL7103233A (sv) | 1971-03-11 | 1971-03-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
DK133449B DK133449B (da) | 1976-05-17 |
DK133449C true DK133449C (sv) | 1977-03-14 |
Family
ID=19812661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK107272AA DK133449B (da) | 1971-03-11 | 1972-03-08 | Skiveformet informationsbærer, der indeholder i spiralform arrangeret lyd- og/eller billedsignaler i optisk kode, og apparat til aflæsning af en sådan informationsbærer. |
Country Status (13)
Country | Link |
---|---|
JP (1) | JPS5213733B1 (sv) |
BE (1) | BE780451A (sv) |
CA (1) | CA953419A (sv) |
CH (1) | CH558053A (sv) |
DK (1) | DK133449B (sv) |
ES (2) | ES400596A1 (sv) |
FR (1) | FR2129626A5 (sv) |
GB (1) | GB1387304A (sv) |
IT (1) | IT952934B (sv) |
NL (1) | NL7103233A (sv) |
NO (1) | NO138162C (sv) |
SE (1) | SE396493B (sv) |
ZA (1) | ZA72928B (sv) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4161752A (en) * | 1977-06-28 | 1979-07-17 | International Business Machines Corporation | High density video disk having two pit depths |
NL7803517A (nl) * | 1978-04-03 | 1979-10-05 | Philips Nv | Registratiedrager met een optisch uitleesbare fase- struktuur en inrichting voor het uitlezen. |
FR2442487A2 (fr) * | 1978-11-21 | 1980-06-20 | Thomson Brandt | Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif |
JPH0665950U (ja) * | 1991-07-22 | 1994-09-16 | 勉 宮崎 | 光学読取装置 |
FR2750528A1 (fr) * | 1996-06-28 | 1998-01-02 | Thomson Multimedia Sa | Disque optique compatible a deux systemes de lecture differents |
-
1971
- 1971-03-11 NL NL7103233A patent/NL7103233A/xx unknown
-
1972
- 1972-02-14 ZA ZA720928A patent/ZA72928B/xx unknown
- 1972-03-08 SE SE7202924A patent/SE396493B/sv unknown
- 1972-03-08 CA CA136,517A patent/CA953419A/en not_active Expired
- 1972-03-08 NO NO740/72A patent/NO138162C/no unknown
- 1972-03-08 IT IT67733/72A patent/IT952934B/it active
- 1972-03-08 JP JP47023275A patent/JPS5213733B1/ja active Pending
- 1972-03-08 CH CH336872A patent/CH558053A/xx not_active IP Right Cessation
- 1972-03-08 DK DK107272AA patent/DK133449B/da not_active IP Right Cessation
- 1972-03-08 GB GB1079172A patent/GB1387304A/en not_active Expired
- 1972-03-09 ES ES400596A patent/ES400596A1/es not_active Expired
- 1972-03-09 BE BE780451A patent/BE780451A/xx not_active IP Right Cessation
- 1972-03-13 FR FR7208626A patent/FR2129626A5/fr not_active Expired
-
1974
- 1974-07-01 ES ES427857A patent/ES427857A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ZA72928B (en) | 1973-09-26 |
ES400596A1 (es) | 1975-07-16 |
NO138162C (no) | 1978-07-12 |
DE2209761B2 (de) | 1976-02-12 |
ES427857A1 (es) | 1977-07-01 |
FR2129626A5 (sv) | 1972-10-27 |
NO138162B (no) | 1978-04-03 |
SE396493B (sv) | 1977-09-19 |
GB1387304A (en) | 1975-03-12 |
IT952934B (it) | 1973-07-30 |
CH558053A (de) | 1975-01-15 |
NL7103233A (sv) | 1972-09-13 |
CA953419A (en) | 1974-08-20 |
JPS5213733B1 (sv) | 1977-04-16 |
DK133449B (da) | 1976-05-17 |
BE780451A (fr) | 1972-09-11 |
DE2209761A1 (de) | 1972-09-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PBP | Patent lapsed |