NO750416L - - Google Patents
Info
- Publication number
- NO750416L NO750416L NO750416A NO750416A NO750416L NO 750416 L NO750416 L NO 750416L NO 750416 A NO750416 A NO 750416A NO 750416 A NO750416 A NO 750416A NO 750416 L NO750416 L NO 750416L
- Authority
- NO
- Norway
- Prior art keywords
- recording medium
- areas
- track
- tracks
- information
- Prior art date
Links
- 230000005855 radiation Effects 0.000 claims description 41
- 230000000737 periodic effect Effects 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 238000011896 sensitive detection Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 description 8
- 238000007373 indentation Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- G11B7/004—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
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0938—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following servo format, e.g. guide tracks, pilot signals
-
- 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
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7401858A NL7401858A (nl) | 1974-02-12 | 1974-02-12 | Registratiedrager waarop informatie is aange- t in een optisch uitleesbare struktuur. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO750416L true NO750416L (xx) | 1975-08-13 |
Family
ID=19820729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO750416A NO750416L (xx) | 1974-02-12 | 1975-02-10 |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS50119517A (xx) |
| AT (1) | AT338889B (xx) |
| AU (1) | AU497709B2 (xx) |
| BE (1) | BE825379A (xx) |
| CA (1) | CA1047644A (xx) |
| CH (1) | CH592350A5 (xx) |
| DE (1) | DE2503975A1 (xx) |
| DK (1) | DK138567B (xx) |
| ES (2) | ES434588A1 (xx) |
| FR (1) | FR2260911B1 (xx) |
| GB (1) | GB1501141A (xx) |
| IT (1) | IT1031581B (xx) |
| NL (1) | NL7401858A (xx) |
| NO (1) | NO750416L (xx) |
| SE (1) | SE410808B (xx) |
| ZA (1) | ZA75131B (xx) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7510035A (nl) * | 1975-08-26 | 1977-03-01 | Philips Nv | Registratiedrager met een optisch uitleesbare, langs sporen gerangschikte, informatiestruktuur en inrichting voor het uitlezen daarvan. |
| JPS5363002A (en) * | 1976-11-18 | 1978-06-06 | Sony Corp | Signal recording system and disk type medium for recording signal |
| 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. |
| JPS57103132A (en) * | 1980-12-16 | 1982-06-26 | Matsushita Electric Ind Co Ltd | Recording information carrier and its recorder and reproducer |
| NL8100098A (nl) * | 1981-01-12 | 1982-08-02 | Philips Nv | Registratiedrager met optisch uitleesbare informatiestruktuur. |
| GB8309447D0 (en) * | 1983-04-07 | 1983-05-11 | Combined Tech Corp Plc | Optical data storage |
| US4623784A (en) * | 1984-12-20 | 1986-11-18 | Drexler Technology Corporation | Laser recording apparatus with off-center lens and error detection |
| DE68923833T2 (de) * | 1988-06-20 | 1996-06-13 | Mitsubishi Electric Corp | Optischer Kopf mit Kippkorrekturservomechanismus. |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3314052A (en) * | 1963-04-12 | 1967-04-11 | Ibm | Light modulation system |
| FR2014594B1 (xx) * | 1968-07-15 | 1974-02-22 | Ibm | |
| JPS5117405B2 (xx) * | 1972-05-15 | 1976-06-02 |
-
1974
- 1974-02-12 NL NL7401858A patent/NL7401858A/xx not_active Application Discontinuation
-
1975
- 1975-01-07 ZA ZA00750131A patent/ZA75131B/xx unknown
- 1975-01-31 DE DE19752503975 patent/DE2503975A1/de not_active Withdrawn
- 1975-02-06 CA CA219,532A patent/CA1047644A/en not_active Expired
- 1975-02-07 GB GB5302/75A patent/GB1501141A/en not_active Expired
- 1975-02-07 DK DK45475AA patent/DK138567B/da unknown
- 1975-02-10 AT AT98275A patent/AT338889B/de not_active IP Right Cessation
- 1975-02-10 SE SE7501407A patent/SE410808B/xx unknown
- 1975-02-10 BE BE153229A patent/BE825379A/xx unknown
- 1975-02-10 NO NO750416A patent/NO750416L/no unknown
- 1975-02-10 IT IT20089/75A patent/IT1031581B/it active
- 1975-02-10 ES ES434588A patent/ES434588A1/es not_active Expired
- 1975-02-10 AU AU78025/75A patent/AU497709B2/en not_active Expired
- 1975-02-10 CH CH156575A patent/CH592350A5/xx not_active IP Right Cessation
- 1975-02-12 JP JP50017757A patent/JPS50119517A/ja active Pending
- 1975-02-12 FR FR7504326A patent/FR2260911B1/fr not_active Expired
-
1976
- 1976-10-27 ES ES452770A patent/ES452770A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DK138567C (xx) | 1979-03-05 |
| ZA75131B (en) | 1976-08-25 |
| NL7401858A (nl) | 1975-08-14 |
| GB1501141A (en) | 1978-02-15 |
| IT1031581B (it) | 1979-05-10 |
| DE2503975A1 (de) | 1975-08-14 |
| AU497709B2 (en) | 1979-01-04 |
| DK138567B (da) | 1978-09-25 |
| FR2260911A1 (xx) | 1975-09-05 |
| CH592350A5 (xx) | 1977-10-31 |
| JPS50119517A (xx) | 1975-09-19 |
| ATA98275A (de) | 1977-01-15 |
| SE7501407L (xx) | 1975-08-13 |
| BE825379A (fr) | 1975-08-11 |
| AU7802575A (en) | 1976-08-12 |
| DK45475A (xx) | 1975-10-06 |
| AT338889B (de) | 1977-09-26 |
| ES434588A1 (es) | 1977-03-16 |
| CA1047644A (en) | 1979-01-30 |
| ES452770A1 (es) | 1977-10-01 |
| FR2260911B1 (xx) | 1982-03-05 |
| SE410808B (sv) | 1979-11-05 |
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