JPS5623221B2 - - Google Patents
Info
- Publication number
- JPS5623221B2 JPS5623221B2 JP7577874A JP7577874A JPS5623221B2 JP S5623221 B2 JPS5623221 B2 JP S5623221B2 JP 7577874 A JP7577874 A JP 7577874A JP 7577874 A JP7577874 A JP 7577874A JP S5623221 B2 JPS5623221 B2 JP S5623221B2
- Authority
- JP
- Japan
- 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
- G11B7/24—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
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NLAANVRAGE7309174,A NL172111C (nl) | 1973-07-02 | 1973-07-02 | Registratiedrager waarop informatie is vastgelegd in een optische struktuur en inrichting voor het inschrijven van een dergelijke registratiedrager. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5034508A JPS5034508A (nl) | 1975-04-02 |
| JPS5623221B2 true JPS5623221B2 (nl) | 1981-05-29 |
Family
ID=19819188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7577874A Expired JPS5623221B2 (nl) | 1973-07-02 | 1974-07-02 |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS5623221B2 (nl) |
| AT (1) | AT346096B (nl) |
| BE (1) | BE817188A (nl) |
| BR (1) | BR7405448D0 (nl) |
| CA (1) | CA1039402A (nl) |
| CH (1) | CH592349A5 (nl) |
| DE (1) | DE2429850C2 (nl) |
| DK (1) | DK137735B (nl) |
| ES (1) | ES427804A1 (nl) |
| FR (1) | FR2236240B1 (nl) |
| GB (1) | GB1479294A (nl) |
| IT (1) | IT1014438B (nl) |
| NL (1) | NL172111C (nl) |
| NO (1) | NO144551C (nl) |
| SE (1) | SE402368B (nl) |
| ZA (1) | ZA744185B (nl) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0335455Y2 (nl) * | 1986-01-10 | 1991-07-26 |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7506495A (nl) * | 1975-06-02 | 1976-12-06 | Philips Nv | Inrichting voor het uitlezen van een registratie- drager. |
| JPS5242034U (nl) * | 1975-09-18 | 1977-03-25 | ||
| GB1545234A (en) * | 1975-10-31 | 1979-05-02 | Hitachi Ltd | Information play-back apparatus |
| US4097895A (en) * | 1976-03-19 | 1978-06-27 | Rca Corporation | Multilayer optical record |
| JPS5363002A (en) * | 1976-11-18 | 1978-06-06 | Sony Corp | Signal recording system and disk type medium for recording signal |
| JPS5369006A (en) * | 1976-11-30 | 1978-06-20 | Sony Corp | Reproducer of disc form signal recording media |
| JPS54141604A (en) * | 1978-04-27 | 1979-11-05 | Nippon Columbia | Optical disk and method of fabricating original disk of optical disk |
| CH636466A5 (en) * | 1978-10-17 | 1983-05-31 | Mca Disco Vision | Method and device for recording information in the form of a frequency-modulated signal |
| NL7902363A (nl) * | 1979-03-27 | 1980-09-30 | Philips Nv | Registratiedrager met een optisch uitleesbare informa- tiestruktuur. |
-
1973
- 1973-07-02 NL NLAANVRAGE7309174,A patent/NL172111C/nl not_active IP Right Cessation
-
1974
- 1974-06-21 DE DE2429850A patent/DE2429850C2/de not_active Expired
- 1974-06-28 AT AT538774A patent/AT346096B/de not_active IP Right Cessation
- 1974-06-28 NO NO742366A patent/NO144551C/no unknown
- 1974-06-28 ES ES427804A patent/ES427804A1/es not_active Expired
- 1974-06-28 GB GB28824/74A patent/GB1479294A/en not_active Expired
- 1974-06-28 SE SE7408535A patent/SE402368B/xx unknown
- 1974-06-28 DK DK351274AA patent/DK137735B/da not_active IP Right Cessation
- 1974-06-28 ZA ZA00744185A patent/ZA744185B/xx unknown
- 1974-07-01 CH CH899674A patent/CH592349A5/xx not_active IP Right Cessation
- 1974-07-01 IT IT69079/74A patent/IT1014438B/it active
- 1974-07-02 JP JP7577874A patent/JPS5623221B2/ja not_active Expired
- 1974-07-02 BE BE146165A patent/BE817188A/xx not_active IP Right Cessation
- 1974-07-02 FR FR7422976A patent/FR2236240B1/fr not_active Expired
- 1974-07-02 CA CA203,876A patent/CA1039402A/en not_active Expired
- 1974-07-02 BR BR5448/74A patent/BR7405448D0/pt unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0335455Y2 (nl) * | 1986-01-10 | 1991-07-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| AT346096B (de) | 1978-10-25 |
| NO742366L (nl) | 1975-01-27 |
| IT1014438B (it) | 1977-04-20 |
| CH592349A5 (nl) | 1977-10-31 |
| DK137735B (da) | 1978-04-24 |
| CA1039402A (en) | 1978-09-26 |
| ZA744185B (en) | 1976-02-25 |
| NO144551B (no) | 1981-06-09 |
| DE2429850A1 (de) | 1975-01-30 |
| FR2236240B1 (nl) | 1979-08-24 |
| BE817188A (fr) | 1975-01-02 |
| DE2429850C2 (de) | 1982-11-18 |
| SE7408535L (nl) | 1975-01-03 |
| DK137735C (nl) | 1978-10-02 |
| JPS5034508A (nl) | 1975-04-02 |
| NL172111B (nl) | 1983-02-01 |
| BR7405448D0 (pt) | 1975-04-15 |
| DK351274A (nl) | 1975-02-24 |
| NL172111C (nl) | 1983-07-01 |
| GB1479294A (en) | 1977-07-13 |
| NL7309174A (nl) | 1975-01-06 |
| AU7074274A (en) | 1976-01-08 |
| ATA538774A (de) | 1978-02-15 |
| ES427804A1 (es) | 1976-08-01 |
| FR2236240A1 (nl) | 1975-01-31 |
| SE402368B (sv) | 1978-06-26 |
| NO144551C (no) | 1981-09-16 |