DK145868C - Apparat til aflaesning af en straalingsreflekterende registreringsbaerer og omfattende en fokuseringsfejldetektor - Google Patents

Apparat til aflaesning af en straalingsreflekterende registreringsbaerer og omfattende en fokuseringsfejldetektor

Info

Publication number: DK145868C
Authority: DK; Denmark
Prior art keywords: registrar; reading; focus error; error detector; radiator
Prior art date: 1977-03-22

Application number

DK120578A

Other languages

Danish (da)

English (en)

Other versions

DK120578A (da

DK145868B (da

Inventor

Hendrik T Lam

Original Assignee

Philips 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.)

1977-03-22

Filing date

1978-03-17

Publication date

1983-09-12

1978-03-17 Application filed by Philips Nv filed Critical Philips Nv

1978-09-23 Publication of DK120578A publication Critical patent/DK120578A/da

1983-03-21 Publication of DK145868B publication Critical patent/DK145868B/da

1983-09-12 Application granted granted Critical

1983-09-12 Publication of DK145868C publication Critical patent/DK145868C/da

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
- G11B7/08—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
- G11B7/0908—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 for focusing only
- G11B7/0909—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 for focusing only by astigmatic methods

DK120578A 1977-03-22 1978-03-17 Apparat til aflaesning af en straalingsreflekterende registreringsbaerer og omfattende en fokuseringsfejldetektor DK145868C (da)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
NL7703076		1977-03-22
NL7703076A NL7703076A (nl)	1977-03-22	1977-03-22	Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager.

Publications (3)

Publication Number	Publication Date
DK120578A DK120578A (da)	1978-09-23
DK145868B DK145868B (da)	1983-03-21
DK145868C true DK145868C (da)	1983-09-12

Family

ID=19828205

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DK120578A DK145868C (da)	1977-03-22	1978-03-17	Apparat til aflaesning af en straalingsreflekterende registreringsbaerer og omfattende en fokuseringsfejldetektor

Country Status (20)

Country	Link
JP (1)	JPS53117403A (de)
AR (1)	AR214353A1 (de)
AT (1)	AT369580B (de)
AU (1)	AU510218B2 (de)
BE (1)	BE865083A (de)
BR (1)	BR7801690A (de)
CA (1)	CA1109560A (de)
CH (1)	CH627016A5 (de)
DE (1)	DE2810616A1 (de)
DK (1)	DK145868C (de)
ES (1)	ES468055A1 (de)
FR (1)	FR2385171A1 (de)
IT (1)	IT1093316B (de)
MX (1)	MX143603A (de)
NL (1)	NL7703076A (de)
NZ (1)	NZ186732A (de)
PL (1)	PL113996B1 (de)
SE (1)	SE424676B (de)
YU (1)	YU39193B (de)
ZA (1)	ZA78216B (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4290132A (en) *	1977-05-11	1981-09-15	Pioneer Electronic Corporation	Focus servo device for use in an optical information read-out device
FR2460022B1 (fr) *	1979-06-25	1987-09-11	Hitachi Ltd	Systeme optique de reproduction d'informations
NL7907216A (nl) *	1979-09-28	1981-03-31	Philips Nv	Optisch fokusfout-detektiestelsel.
JPS59125727U (ja) *	1983-02-15	1984-08-24	パイオニア株式会社	光学式情報ピツクアツプ装置
NL8400674A (nl) *	1984-03-02	1985-10-01	Philips Nv	Inrichting voor het inschrijven en/of uitlezen van informatie in een spoor van een reflekterende registratiedrager, met een fokusregeling met verminderde spot offsetgevoeligheid.
JPS6139942A (ja) *	1984-08-01	1986-02-26	Matsushita Electric Ind Co Ltd	光ピツクアツプ
US4609813A (en) *	1985-03-18	1986-09-02	International Business Machines Corporation	Optical systems employing ovate light beams
JPS6310326A (ja) *	1986-07-01	1988-01-16	Sanyo Electric Co Ltd	光ピツクアツプ装置
DE3828146A1 (de) *	1988-08-19	1990-02-22	Philips Patentverwaltung	Elektrodynamischer aktuator fuer eine optische einschreib- und ausleseeinheit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2271590B1 (de) *	1974-01-15	1978-12-01	Thomson Brandt
NL182990C (nl) *	1975-07-07	1988-06-16	Philips Nv	Inrichting voor het uitlezen van een stralingsreflekterende registratiedrager.
FR2325987A1 (fr) *	1975-09-29	1977-04-22	Thomson Brandt	Dispositif de lecture optique d'un enregistrement
GB1532345A (en) *	1976-06-25	1978-11-15	Hitachi Ltd	Information play-back apparatus
JPS5337722A (en) *	1976-09-20	1978-04-07	Ebata Shiyouji Kk	Method of producing concrete piles
NL7703077A (nl) *	1977-03-22	1978-09-26	Philips Nv	Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager.

1977
- 1977-03-22 NL NL7703076A patent/NL7703076A/xx not_active Application Discontinuation
1978
- 1978-01-12 ZA ZA00780216A patent/ZA78216B/xx unknown
- 1978-02-06 AR AR270983A patent/AR214353A1/es active
- 1978-03-11 DE DE19782810616 patent/DE2810616A1/de active Pending
- 1978-03-15 CA CA298,999A patent/CA1109560A/en not_active Expired
- 1978-03-17 DK DK120578A patent/DK145868C/da not_active IP Right Cessation
- 1978-03-17 IT IT21340/78A patent/IT1093316B/it active
- 1978-03-17 MX MX172816A patent/MX143603A/es unknown
- 1978-03-20 CH CH302678A patent/CH627016A5/de not_active IP Right Cessation
- 1978-03-20 AU AU34294/78A patent/AU510218B2/en not_active Expired
- 1978-03-20 SE SE7803138A patent/SE424676B/sv not_active IP Right Cessation
- 1978-03-20 ES ES468055A patent/ES468055A1/es not_active Expired
- 1978-03-20 PL PL1978205453A patent/PL113996B1/pl unknown
- 1978-03-20 NZ NZ186732A patent/NZ186732A/xx unknown
- 1978-03-20 AT AT0196578A patent/AT369580B/de not_active IP Right Cessation
- 1978-03-20 BR BR7801690A patent/BR7801690A/pt unknown
- 1978-03-20 BE BE186087A patent/BE865083A/xx not_active IP Right Cessation
- 1978-03-21 YU YU00673/78A patent/YU39193B/xx unknown
- 1978-03-22 FR FR7808294A patent/FR2385171A1/fr active Pending
- 1978-03-22 JP JP3182778A patent/JPS53117403A/ja active Pending

Also Published As

Publication number	Publication date
YU39193B (en)	1984-08-31
AU510218B2 (en)	1980-06-12
BE865083A (fr)	1978-09-20
DK120578A (da)	1978-09-23
IT1093316B (it)	1985-07-19
PL113996B1 (en)	1981-01-31
SE424676B (sv)	1982-08-02
IT7821340A0 (it)	1978-03-17
NL7703076A (nl)	1978-09-26
DK145868B (da)	1983-03-21
DE2810616A1 (de)	1978-09-28
YU67378A (en)	1982-06-30
FR2385171A1 (fr)	1978-10-20
NZ186732A (en)	1981-02-11
AU3429478A (en)	1979-09-27
AR214353A1 (es)	1979-05-31
MX143603A (es)	1981-06-05
ZA78216B (en)	1979-08-29
BR7801690A (pt)	1979-01-02
SE7803138L (sv)	1978-09-23
JPS53117403A (en)	1978-10-13
AT369580B (de)	1983-01-10
PL205453A1 (pl)	1978-12-18
CA1109560A (en)	1981-09-22
ES468055A1 (es)	1978-11-16
CH627016A5 (en)	1981-12-15
ATA196578A (de)	1982-05-15

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Legal Events

Date	Code	Title	Description
1998-04-20	PUP	Patent expired