NL7708200A - Automatische scherpstellingsinrichting. - Google Patents

Automatische scherpstellingsinrichting.

Info

Publication number: NL7708200A
Authority: NL; Netherlands
Prior art keywords: automatic focus; focus device; automatic; focus
Prior art date: 1976-07-28

Application number

NL7708200A

Other languages

English (en)

Original Assignee

Hitachi Ltd

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.)

1976-07-28

Filing date

1977-07-22

Publication date

1978-01-31

1976-07-28 Priority claimed from JP8909376A external-priority patent/JPS5315801A/ja

1976-08-09 Priority claimed from JP9400176A external-priority patent/JPS5319807A/ja

1977-07-22 Application filed by Hitachi Ltd filed Critical Hitachi Ltd

1978-01-31 Publication of NL7708200A publication Critical patent/NL7708200A/nl

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
- 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
- G11B7/094—Methods and circuits for servo offset compensation

NL7708200A 1976-07-28 1977-07-22 Automatische scherpstellingsinrichting. NL7708200A (nl)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
JP8909376A JPS5315801A (en)	1976-07-28	1976-07-28	Optical point controller for light flux
JP9400176A JPS5319807A (en)	1976-08-09	1976-08-09	Luminous flux focus controller

Publications (1)

Publication Number	Publication Date
NL7708200A true NL7708200A (nl)	1978-01-31

Family

ID=26430526

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL7708200A NL7708200A (nl)	1976-07-28	1977-07-22	Automatische scherpstellingsinrichting.

Country Status (5)

Country	Link
US (1)	US4163149A (nl)
DE (1)	DE2734163C2 (nl)
FR (1)	FR2360150A1 (nl)
GB (1)	GB1590844A (nl)
NL (1)	NL7708200A (nl)

Families Citing this family (36)

* 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
JPS54133305A (en) *	1978-04-07	1979-10-17	Hitachi Ltd	Information recorder
JPS55927A (en) *	1978-06-16	1980-01-07	Pioneer Video Corp	Focus servo unit of optical information reader
JPS5821334B2 (ja) *	1978-12-25	1983-04-28	株式会社東芝	自動焦点調節装置
NL7904724A (nl) *	1979-06-18	1980-12-22	Philips Nv	Optische aftastinrichting met fokusseerstelsel.
FR2460523A1 (fr) *	1979-06-29	1981-01-23	Thomson Csf	Tete de lecture optique a source laser a semi-conducteur et dispositif de lecture par reflexion d'un support d'information comportant une telle tete optique
NL7907216A (nl) *	1979-09-28	1981-03-31	Philips Nv	Optisch fokusfout-detektiestelsel.
JPS5690434A (en) *	1979-12-19	1981-07-22	Hitachi Ltd	Optical information reproducing device
US4504934A (en) *	1980-05-02	1985-03-12	Matsushita Electric Industrial Co., Ltd.	Optical signal reproducing apparatus
JPS5766533A (en) *	1980-10-09	1982-04-22	Olympus Optical Co Ltd	Optical information reader
JPS5774837A (en) *	1980-10-25	1982-05-11	Olympus Optical Co Ltd	Signal detection system of optical information reproducing device
JPS57189348A (en) *	1981-05-14	1982-11-20	Olympus Optical Co Ltd	Auto-focus system of optical disk
US4414658A (en) *	1981-06-12	1983-11-08	Mcdonnell Douglas Corporation	Linear tracking arrangement in a photographic disc type information containing system
JPS58121148A (ja) *	1982-01-11	1983-07-19	Olympus Optical Co Ltd	光学的情報記録再生装置
JPS58128031A (ja) *	1982-01-24	1983-07-30	Sony Corp	デイスク再生装置
US4622659A (en) *	1982-09-09	1986-11-11	Burroughs Corporation	Focus detection and control apparatus for maintaining accurate focusing in an optical memory system by detecting reflected beam diameter variations at spaced predetermined locations
US4621353A (en) *	1982-09-09	1986-11-04	Burroughs Corporation	Optical memory system providing improved focusing control and improved beam combining and separating apparatus
US4559622A (en) *	1982-09-09	1985-12-17	Burroughs Corporation	Optical memory system providing improved focus detection and control by detecting reflected beam diameter variations at spaced predetermined locations in the system
US4665512A (en) *	1983-09-29	1987-05-12	Kabushiki Kaisha Toshiba	Optical head for erasing
JPS6070923U (ja) *	1983-10-19	1985-05-20	パイオニア株式会社	焦点誤差検出装置
JPS6070924U (ja) *	1983-10-19	1985-05-20	パイオニア株式会社	焦点誤差検出装置
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.
EP0157020B1 (en) *	1984-04-05	1989-03-15	Agfa-Gevaert N.V.	Device for accurately focussing a laser beam
US4692608A (en) *	1984-05-18	1987-09-08	Fuji Photo Optical Company, Ltd.	Compact optical imaging system
JPS61177646A (ja) *	1985-02-04	1986-08-09	インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション	光学デイスク装置
US4899327A (en) *	1985-02-04	1990-02-06	International Business Machines Corporation	Focus servo loop correction
US4823330A (en) *	1985-02-04	1989-04-18	International Business Machines Corporation	Focus servo loop off-set compensation
JPS629537A (ja) *	1985-07-08	1987-01-17	Pioneer Electronic Corp	光学式ピツクアツプ装置
JP2786181B2 (ja) *	1985-12-21	1998-08-13	ソニー株式会社	光ディスク装置
US4799210A (en) *	1986-11-05	1989-01-17	Unisys Corporation	Fiber optic read/write head for an optical disk memory system
JPH01173323A (ja) *	1987-12-26	1989-07-10	Toshiba Corp	情報処理装置
JPH01173441A (ja) *	1987-12-28	1989-07-10	Toshiba Corp	情報記録再生装置
JPH11259873A (ja) *	1998-03-12	1999-09-24	Olympus Optical Co Ltd	光ピックアップ
EP1700299A1 (en) *	2003-12-23	2006-09-13	Koninklijke Philips Electronics N.V.	Optical pick-up unit
JP2006252599A (ja) *	2005-03-08	2006-09-21	Mitsubishi Electric Corp	光学装置及びそれを用いた光デイスク装置
US20070194684A1 (en) *	2006-02-21	2007-08-23	Chen Yi-Yi	Light emitting diode structure

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2271590B1 (nl) *	1974-01-15	1978-12-01	Thomson Brandt
FR2325987A1 (fr) *	1975-09-29	1977-04-22	Thomson Brandt	Dispositif de lecture optique d'un enregistrement
US4065786A (en) *	1975-09-30	1977-12-27	Rca Corporation	Videodisc playback system
NL7600843A (nl) *	1976-01-28	1977-08-01	Philips Nv	Inrichting voor het uitlezen van een registratie- drager waarop informatie, bijvoorbeeld en/of ge- luidsinformatie, is aangebracht.

1977
- 1977-07-22 NL NL7708200A patent/NL7708200A/nl not_active Application Discontinuation
- 1977-07-27 GB GB31616/77A patent/GB1590844A/en not_active Expired
- 1977-07-28 FR FR7723236A patent/FR2360150A1/fr active Granted
- 1977-07-28 DE DE2734163A patent/DE2734163C2/de not_active Expired
- 1977-07-28 US US05/819,861 patent/US4163149A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
US4163149A (en)	1979-07-31
FR2360150A1 (fr)	1978-02-24
DE2734163A1 (de)	1978-02-02
GB1590844A (en)	1981-06-10
DE2734163C2 (de)	1983-08-18
FR2360150B1 (nl)	1981-05-29

Publication	Publication Date	Title
NL7708200A (nl)	1978-01-31	Automatische scherpstellingsinrichting.
SE7700343L (sv)	1977-07-20	Automatisk fokuseringsanordning
NL167075C (nl)	1981-10-15	Automatische focusseerinrichting.
NL7711251A (nl)	1978-04-25	Elektromedicinale inrichting.
NL7708118A (nl)	1978-02-08	Automatische transportinrichting.
NL160642C (nl)	1979-11-15	Tapinrichting.
NL7703967A (nl)	1977-10-17	Halfgeleiderinrichting.
NL7802109A (nl)	1978-08-29	Automatische injectie-inrichting.
NL177956C (nl)	1985-12-16	Fotokoppelinrichting.
NL7601416A (nl)	1977-08-16	Halfgeleiderinrichting.
NO772522L (no)	1978-02-24	Logge-apparat.
NL7703297A (nl)	1977-10-04	Ladingsgekoppelde inrichting.
NL7806799A (nl)	1978-12-28	Automatische afsteminrichting.
NL7709281A (nl)	1978-02-28	Halfgeleiderinrichting.
NL7703476A (nl)	1977-10-04	Tril-afsluit-inrichting.
NL7708047A (nl)	1978-01-24	Licht-uitzendende inrichting.
NL7703610A (nl)	1977-10-04	Automatische scherpstellingsinrichting.
NL7713078A (nl)	1978-06-06	Halfgeleiderinrichting.
NL184661C (nl)	1989-10-02	Computer-tomografische inrichting.
NL7705182A (nl)	1977-11-14	Biopsie-inrichting.
NL7701949A (nl)	1977-08-29	Trek-ontlast-inrichting.
NL7812058A (nl)	1979-06-19	Automatische scherpstellingsinrichting.
SE398379B (sv)	1977-12-19	Automatisk efterstellningsanordning
NL7602230A (nl)	1976-09-28	Automatische origineelverzorgingsinrichting.
NL7703467A (nl)	1977-10-04	Automatische tekeninrichting.

Legal Events

Date	Code	Title
1984-09-03	BC	A request for examination has been filed
1985-01-01	A85	Still pending on 85-01-01
1989-03-01	BV	The patent application has lapsed