AU510218B2 - Optically reading a reflecting record carrier - Google Patents

Optically reading a reflecting record carrier

Info

Publication number: AU510218B2
Authority: AU; Australia
Prior art keywords: record carrier; optically reading; reflecting record; reflecting; optically
Prior art date: 1977-03-22
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

AU34294/78A

Other languages

English (en)

Other versions

AU3429478A (en

Inventor

H T Lam

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.)

1977-03-22

Filing date

1978-03-20

Publication date

1980-06-12

1978-03-20 Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV

1979-09-27 Publication of AU3429478A publication Critical patent/AU3429478A/en

1980-06-12 Application granted granted Critical

1980-06-12 Publication of AU510218B2 publication Critical patent/AU510218B2/en

Status Expired legal-status Critical Current

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

AU34294/78A 1977-03-22 1978-03-20 Optically reading a reflecting record carrier Expired AU510218B2 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
NLNL7703076		1977-03-22
NL7703076A NL7703076A (nl)	1977-03-22	1977-03-22	Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager.

Publications (2)

Publication Number	Publication Date
AU3429478A AU3429478A (en)	1979-09-27
AU510218B2 true AU510218B2 (en)	1980-06-12

Family

ID=19828205

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
AU34294/78A Expired AU510218B2 (en)	1977-03-22	1978-03-20	Optically reading a reflecting record carrier

Country Status (20)

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

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CA1131361A (fr) *	1977-05-11	1982-09-07	Fumitaka Kotaka	Servomecanisme de focalisation pour afficheur optique
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 (fr) *	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/fr not_active Expired
- 1978-03-17 MX MX172816A patent/MX143603A/es unknown
- 1978-03-17 IT IT21340/78A patent/IT1093316B/it active
- 1978-03-17 DK DK120578A patent/DK145868C/da not_active IP Right Cessation
- 1978-03-20 SE SE7803138A patent/SE424676B/sv not_active IP Right Cessation
- 1978-03-20 PL PL1978205453A patent/PL113996B1/pl unknown
- 1978-03-20 AT AT0196578A patent/AT369580B/de not_active IP Right Cessation
- 1978-03-20 NZ NZ186732A patent/NZ186732A/xx unknown
- 1978-03-20 BR BR7801690A patent/BR7801690A/pt unknown
- 1978-03-20 CH CH302678A patent/CH627016A5/de not_active IP Right Cessation
- 1978-03-20 BE BE186087A patent/BE865083A/fr not_active IP Right Cessation
- 1978-03-20 ES ES468055A patent/ES468055A1/es not_active Expired
- 1978-03-20 AU AU34294/78A patent/AU510218B2/en not_active Expired
- 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
SE7803138L (sv)	1978-09-23
PL113996B1 (en)	1981-01-31
YU67378A (en)	1982-06-30
NL7703076A (nl)	1978-09-26
AU3429478A (en)	1979-09-27
BE865083A (fr)	1978-09-20
JPS53117403A (en)	1978-10-13
BR7801690A (pt)	1979-01-02
AR214353A1 (es)	1979-05-31
ES468055A1 (es)	1978-11-16
IT7821340A0 (it)	1978-03-17
ZA78216B (en)	1979-08-29
DK145868C (da)	1983-09-12
PL205453A1 (pl)	1978-12-18
CA1109560A (fr)	1981-09-22
MX143603A (es)	1981-06-05
IT1093316B (it)	1985-07-19
ATA196578A (de)	1982-05-15
NZ186732A (en)	1981-02-11
DE2810616A1 (de)	1978-09-28
CH627016A5 (en)	1981-12-15
SE424676B (sv)	1982-08-02
YU39193B (en)	1984-08-31
AT369580B (de)	1983-01-10
DK145868B (da)	1983-03-21
FR2385171A1 (fr)	1978-10-20
DK120578A (da)	1978-09-23

Publication	Publication Date	Title
AU516911B2 (en)	1981-06-25	Optical record carrier
AU537317B2 (en)	1984-06-14	Optically reading a record cainer
AU511092B2 (en)	1980-07-24	Apparatus for reading a radiation reflecting record carrier
AU505234B2 (en)	1979-11-15	Reading a flat record carrier withan optically readable information structure
AU500837B2 (en)	1979-05-31	Optically reading record carriers
AU511495B2 (en)	1980-08-21	Optically reading recorded signals employing hologram element
AU530555B2 (en)	1983-07-21	Optical record carrier
AU5455080A (en)	1980-07-24	Optically recording information
AU505467B2 (en)	1979-11-22	Focussing system inan apparatus for optically reading a record carrier
ZA773820B (en)	1979-01-31	Optical read unit for scanning a record carrier having a radiation-reflecting information structure
AU552691B2 (en)	1986-06-12	Optically reading a disk shaped record carrier
AU509203B2 (en)	1980-04-24	Optically reading record carrier pits
AU523032B2 (en)	1982-07-08	Optically readable information disk
AU531122B2 (en)	1983-08-11	Optical information record
AU530291B2 (en)	1983-07-07	Reading an optical record carrier
AU531730B2 (en)	1983-09-01	Optically readable record carrier
AU507538B2 (en)	1980-02-21	Reading a record carrier
AU516903B2 (en)	1981-06-25	Optically reading a record carrier
AU535939B2 (en)	1984-04-12	Optically readable record carrier
AU510218B2 (en)	1980-06-12	Optically reading a reflecting record carrier
AU529867B2 (en)	1983-06-23	Reading a disc shaped record carrier
JPS5395603A (en)	1978-08-22	Binaryycoded digital optical data record