IT1095296B - Trasduttore ottico e sistema di focalizzazione - Google Patents

Trasduttore ottico e sistema di focalizzazione

Info

Publication number
IT1095296B
IT1095296B IT24247/78A IT2424778A IT1095296B IT 1095296 B IT1095296 B IT 1095296B IT 24247/78 A IT24247/78 A IT 24247/78A IT 2424778 A IT2424778 A IT 2424778A IT 1095296 B IT1095296 B IT 1095296B
Authority
IT
Italy
Prior art keywords
focusing system
optical transducer
transducer
optical
focusing
Prior art date
Application number
IT24247/78A
Other languages
English (en)
Other versions
IT7824247A0 (it
Original Assignee
Mca Disco Vision
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.)
Filing date
Publication date
Application filed by Mca Disco Vision filed Critical Mca Disco Vision
Publication of IT7824247A0 publication Critical patent/IT7824247A0/it
Application granted granted Critical
Publication of IT1095296B publication Critical patent/IT1095296B/it

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
    • G11B7/0912—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 push-pull method
IT24247/78A 1977-06-06 1978-06-06 Trasduttore ottico e sistema di focalizzazione IT1095296B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80398677A 1977-06-06 1977-06-06

Publications (2)

Publication Number Publication Date
IT7824247A0 IT7824247A0 (it) 1978-06-06
IT1095296B true IT1095296B (it) 1985-08-10

Family

ID=25187910

Family Applications (1)

Application Number Title Priority Date Filing Date
IT24247/78A IT1095296B (it) 1977-06-06 1978-06-06 Trasduttore ottico e sistema di focalizzazione

Country Status (10)

Country Link
US (1) US4152586A (it)
JP (1) JPS544105A (it)
BE (1) BE867877A (it)
CA (1) CA1120152A (it)
DE (1) DE2824778C2 (it)
FR (1) FR2394106B1 (it)
GB (1) GB1603596A (it)
HK (1) HK42186A (it)
IT (1) IT1095296B (it)
NL (1) NL7806068A (it)

Families Citing this family (48)

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Publication number Priority date Publication date Assignee Title
US4358796A (en) * 1978-03-27 1982-11-09 Discovision Associates Spindle servo system for videodisc player
US4370679A (en) * 1978-03-27 1983-01-25 Discovision Associates Gain correction system for videodisc player apparatus
US4371899A (en) * 1978-03-27 1983-02-01 Discovision Associates Time base error correction system for player
US4226541A (en) * 1978-08-11 1980-10-07 Tisue James G Method and apparatus for suppressing the effects of surface light scatter in optical reflective scanning system
GB2057218B (en) * 1979-06-25 1984-02-29 Olympus Optical Co Detecting focussing error
JPS5727444A (en) * 1980-07-25 1982-02-13 Olympus Optical Co Ltd Focus detector
US4488279A (en) * 1980-10-20 1984-12-11 Discovision Associates Video recorder-playback machine
US4467467A (en) * 1980-10-20 1984-08-21 Discovision Associates Video recorder-playback machine
US4354102A (en) * 1980-11-13 1982-10-12 The United States Of America As Represented By The Secretary Of The Air Force Cursor apparatus for interactive graphic display system
US4376303A (en) * 1980-12-19 1983-03-08 Rca Corporation Quasi-zoom lens optical focus sensor
US4381557A (en) * 1980-12-19 1983-04-26 Rca Corporation Optical focus sensor
US4458144A (en) * 1981-06-30 1984-07-03 Storage Technology Corporation Apparatus for reading information stored in a track pattern on a radiation reflecting record
US4538062A (en) * 1981-11-19 1985-08-27 Olympus Optical Co., Ltd. Focusing detecting device with coaxial source and detector
US4534021A (en) * 1981-12-10 1985-08-06 Discovision Associates Angularly multiplexed optical recording medium
FR2518767A1 (fr) * 1981-12-17 1983-06-24 Centre Nat Etd Spatiales Procede de reglage automatique de la nettete d'images projetees sur un ecran et dispositifs pour la mise en oeuvre dudit procede
US4556787A (en) * 1982-03-23 1985-12-03 Olympus Optical Co., Ltd. Photosensor for optical observing or photographing devices
US4511248A (en) * 1982-06-30 1985-04-16 Eastman Kodak Company Active electro-optical distance detection methods and devices
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
US4621353A (en) * 1982-09-09 1986-11-04 Burroughs Corporation Optical memory system providing improved focusing control and improved beam combining and separating apparatus
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
US4501493A (en) * 1982-10-28 1985-02-26 Sony Corporation Apparatus for detecting a position of an optical pickup
NL8300291A (nl) * 1983-01-27 1984-08-16 Philips Nv Inrichting voor het uitlezen van een optische registratiedrager.
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
JPS59162514A (ja) * 1983-03-08 1984-09-13 Dainippon Screen Mfg Co Ltd 画像走査記録装置における焦点調整方法
US4654515A (en) * 1983-05-28 1987-03-31 Kabushiki Kaisha Toshiba Optical head for focussing a light beam on an information recording medium
US4705941A (en) * 1983-06-30 1987-11-10 Kabushiki Kaisha Toshiba Apparatus for detecting a focusing state of an optical system
DE3483646D1 (de) * 1983-07-06 1991-01-03 Matsushita Electric Ind Co Ltd Lichtaufnahmekopf.
DE3333830C2 (de) * 1983-09-20 1985-08-01 Ralf 6751 Katzweiler Hinkel Verfahren zur Laserentfernungsmessung mit hoher Auflösung für den Nahbereich
JPS60185230A (ja) * 1984-03-02 1985-09-20 Pioneer Electronic Corp 焦点誤差検出装置
JPS618744A (ja) * 1984-06-22 1986-01-16 Fuji Photo Film Co Ltd 光デイスク装置のフオ−カス誤差検出装置
JPS6251038A (ja) * 1985-08-30 1987-03-05 Canon Inc 光学的情報記録再生装置
US4798469A (en) * 1985-10-02 1989-01-17 Burke Victor B Noncontact gage system utilizing reflected light
JPS62188031A (ja) * 1986-02-13 1987-08-17 Csk Corp 焦点整合位置検出方式
GB8621810D0 (en) * 1986-09-10 1986-10-15 Whitehouse J C Rangefinder for robotic applications
JPS63176929U (it) * 1987-03-26 1988-11-16
JPS63257925A (ja) * 1987-04-15 1988-10-25 Nippon Coinco:Kk 光ヘツドの焦点制御信号検出装置
JP2887273B2 (ja) * 1987-05-22 1999-04-26 パイオニア株式会社 光学式ピックアップ装置
US4843603A (en) * 1988-03-11 1989-06-27 Optotech, Inc. Concentric photodetector arrangement for focusing and tracking
US4958245A (en) * 1988-04-07 1990-09-18 Insite Peripherals, Inc. Apparatus and method for optical servo control with media having information storage and servo control regions of different reflectivities
US5195081A (en) * 1988-04-22 1993-03-16 Canon Kabushiki Kaisha Optical apparatus for effecting recording and/or reproducing of information on/from and optical information recording medium
US5157249A (en) * 1991-02-19 1992-10-20 Olympus Optical Co., Ltd. Miniaturized optical pick-up with high sensitivity focusing error detecting device
US5663554A (en) * 1995-01-17 1997-09-02 Agfa Division, Bayer Corporation Weak lens focus adjusting mechanism based upon thickness of scanned material and imagesetter using same
US5978329A (en) * 1995-06-07 1999-11-02 Discovision Associates Technique for closed loop servo operation in optical disc tracking control
KR100200857B1 (ko) * 1995-10-04 1999-06-15 윤종용 광픽업장치
ES2112224T1 (es) 1995-12-06 1998-04-01 Discovision Ass Aparato y metodo para control de foco.
US5689485A (en) 1996-04-01 1997-11-18 Discovision Associates Tracking control apparatus and method
GB2355354A (en) * 1999-08-03 2001-04-18 Axon Instr Inc Auto-focus method
US7936659B2 (en) * 2002-07-03 2011-05-03 Discovision Associates Method and apparatus for micro optical recording and playback tracking control

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454772A (en) * 1966-12-20 1969-07-08 Hughes Aircraft Co Photoelectric monitoring system for holding the object plane in proper focus
US3596101A (en) * 1969-11-05 1971-07-27 Canon Kk Optical systems for automatic focusing apparatus
US3890499A (en) * 1970-05-15 1975-06-17 Us Army Differential scanner system
DE2102922C3 (de) * 1971-01-22 1978-08-24 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Anordnung zum selbsttätigen Fokussieren auf in optischen Geräten zu betrachtende Objekte
US3757124A (en) * 1971-08-13 1973-09-04 P Kaestner Optical apparatus for focusing an image
AR205243A1 (es) * 1972-05-11 1976-04-21 Philips Nv Aparato para la lectura de un portador de grabacion reflector plano
NL7414695A (nl) * 1973-11-09 1975-05-13 Hitachi Ltd Automatische focusseringsinrichting.
JPS5091317A (it) * 1973-12-12 1975-07-22
US3997715A (en) * 1974-03-25 1976-12-14 Mca Disco-Vision, Inc. Focusing system for videodisc player
NL182257C (nl) * 1974-12-23 1988-02-01 Philips Nv Inrichting voor het uitlezen van een vlakke reflekterende registratiedrager waarop informatie is aangebracht in een optisch uitleesbare struktuur.

Also Published As

Publication number Publication date
IT7824247A0 (it) 1978-06-06
JPS544105A (en) 1979-01-12
NL7806068A (nl) 1978-12-08
DE2824778C2 (de) 1982-07-22
GB1603596A (en) 1981-11-25
FR2394106B1 (fr) 1985-07-19
HK42186A (en) 1986-06-13
DE2824778A1 (de) 1979-01-04
BE867877A (fr) 1978-12-06
FR2394106A1 (fr) 1979-01-05
US4152586A (en) 1979-05-01
CA1120152A (en) 1982-03-16

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