FR2236240B1 - - Google Patents

Info

Publication number: FR2236240B1
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

Application number

FR7422976A

Other languages

French (fr)

Other versions

FR2236240A1 (de

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Koninklijke Philips NV

Original Assignee

Philips Gloeilampenfabrieken NV

Priority date (The priority date 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 date listed.)

1973-07-02

Filing date

1974-07-02

Publication date

1979-08-24

1974-07-02 Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV

1975-01-31 Publication of FR2236240A1 publication Critical patent/FR2236240A1/fr

1979-08-24 Application granted granted Critical

1979-08-24 Publication of FR2236240B1 publication Critical patent/FR2236240B1/fr

Status Expired legal-status Critical Current

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)

FR7422976A 1973-07-02 1974-07-02 Expired FR2236240B1 (de)

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
FR2236240A1 FR2236240A1 (de)	1975-01-31
FR2236240B1 true FR2236240B1 (de)	1979-08-24

Family

ID=19819188

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR7422976A Expired FR2236240B1 (de)	1973-07-02	1974-07-02

Country Status (16)

Country	Link
JP (1)	JPS5623221B2 (de)
AT (1)	AT346096B (de)
BE (1)	BE817188A (de)
BR (1)	BR7405448D0 (de)
CA (1)	CA1039402A (de)
CH (1)	CH592349A5 (de)
DE (1)	DE2429850C2 (de)
DK (1)	DK137735B (de)
ES (1)	ES427804A1 (de)
FR (1)	FR2236240B1 (de)
GB (1)	GB1479294A (de)
IT (1)	IT1014438B (de)
NL (1)	NL172111C (de)
NO (1)	NO144551C (de)
SE (1)	SE402368B (de)
ZA (1)	ZA744185B (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
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 (de) *	1975-09-18	1977-03-25
NL7612070A (nl) *	1975-10-31	1977-05-03	Hitachi Ltd	Inrichting voor het uitlezen van informatie.
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
CH636467A5 (en) *	1978-10-17	1983-05-31	Mca Disco Vision	Method and device for recording a modulated electrical signal
NL7902363A (nl) *	1979-03-27	1980-09-30	Philips Nv	Registratiedrager met een optisch uitleesbare informa- tiestruktuur.
JPH0335455Y2 (de) *	1986-01-10	1991-07-26

1973
- 1973-07-02 NL NLAANVRAGE7309174,A patent/NL172111C/xx 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 GB GB28824/74A patent/GB1479294A/en not_active Expired
- 1974-06-28 SE SE7408535A patent/SE402368B/xx unknown
- 1974-06-28 ZA ZA00744185A patent/ZA744185B/xx unknown
- 1974-06-28 DK DK351274AA patent/DK137735B/da not_active IP Right Cessation
- 1974-06-28 ES ES427804A patent/ES427804A1/es not_active Expired
- 1974-07-01 IT IT69079/74A patent/IT1014438B/it active
- 1974-07-01 CH CH899674A patent/CH592349A5/xx not_active IP Right Cessation
- 1974-07-02 BE BE146165A patent/BE817188A/xx not_active IP Right Cessation
- 1974-07-02 JP JP7577874A patent/JPS5623221B2/ja not_active Expired
- 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

Also Published As

Publication number	Publication date
JPS5034508A (de)	1975-04-02
IT1014438B (it)	1977-04-20
ZA744185B (en)	1976-02-25
DK137735C (de)	1978-10-02
FR2236240A1 (de)	1975-01-31
NL172111B (nl)	1983-02-01
AU7074274A (en)	1976-01-08
CA1039402A (en)	1978-09-26
DK137735B (da)	1978-04-24
DE2429850A1 (de)	1975-01-30
NO742366L (de)	1975-01-27
AT346096B (de)	1978-10-25
DE2429850C2 (de)	1982-11-18
NL7309174A (nl)	1975-01-06
NO144551C (no)	1981-09-16
SE402368B (sv)	1978-06-26
SE7408535L (de)	1975-01-03
GB1479294A (en)	1977-07-13
NO144551B (no)	1981-06-09
DK351274A (de)	1975-02-24
NL172111C (nl)	1983-07-01
BR7405448D0 (pt)	1975-04-15
ATA538774A (de)	1978-02-15
JPS5623221B2 (de)	1981-05-29
ES427804A1 (es)	1976-08-01
CH592349A5 (de)	1977-10-31
BE817188A (fr)	1975-01-02

Legal Events

Date	Code	Title	Description
1992-05-29	ST	Notification of lapse

Publication	Publication Date	Title
AU476761B2 (de)	1976-09-30
AU465372B2 (de)	1975-09-25
AR201231Q (de)	1975-02-21
AU474593B2 (de)	1976-07-29
AU474511B2 (de)	1976-07-22
AU474838B2 (de)	1976-08-05
AU471343B2 (de)	1976-04-15
AU465453B2 (de)	1975-09-25
AU465434B2 (de)	1975-09-25
AU476714B2 (de)	1976-09-30
DK137735C (de)	1978-10-02
AR201229Q (de)	1975-02-21
AU466283B2 (de)	1975-10-23
AU472848B2 (de)	1976-06-03
AU476696B2 (de)	1976-09-30
AU477823B2 (de)	1975-06-19
AU477824B2 (de)	1975-07-17
AU461342B2 (de)	1975-05-22
AR200885A1 (de)	1974-12-27
AU471461B2 (de)	1976-04-29
AU476873B1 (de)	1975-01-09
AU479562A (de)	1975-01-09
BG22055A3 (de)	1976-11-25
AU479405A (de)	1975-04-10
AU479404A (de)	1975-03-13