FR2393263B1 - - Google Patents

Info

Publication number
FR2393263B1
FR2393263B1 FR7433046A FR7433046A FR2393263B1 FR 2393263 B1 FR2393263 B1 FR 2393263B1 FR 7433046 A FR7433046 A FR 7433046A FR 7433046 A FR7433046 A FR 7433046A FR 2393263 B1 FR2393263 B1 FR 2393263B1
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
FR7433046A
Other versions
FR2393263A1 (fr
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.)
Filing date
Publication date
Priority claimed from NL7313454A external-priority patent/NL7313454A/xx
Priority claimed from NL7402504A external-priority patent/NL7402504A/xx
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2393263A1 publication Critical patent/FR2393263A1/fr
Application granted granted Critical
Publication of FR2393263B1 publication Critical patent/FR2393263B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/341—Muting when no signals or only weak signals are present
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40—Optical focusing aids
    • 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
    • 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
    • G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/7605—Television signal recording on discs or drums
    • 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
    • G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
    • G11B2007/0924—Skewed beams methods (using an angled beam, i.e. a beam which is reflected from the disc at an angle different from 90°)
FR7433046A 1973-10-01 1974-10-01 Systeme opto-electronique Granted FR2393263A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7313454A NL7313454A (nl) 1973-10-01 1973-10-01 Opto-elektronisch stelsel voor het bepalen van een king tussen de werkelijke positie van een stralings kterend vlak in een optisch afbeeldingsstelsel en d ste positie van dit vlak.
NL7402504A NL7402504A (nl) 1974-02-25 1974-02-25 Inrichting voor het langs optische weg uitlezen van een registratiedrager.

Publications (2)

Publication Number Publication Date
FR2393263A1 FR2393263A1 (fr) 1978-12-29
FR2393263B1 true FR2393263B1 (fr) 1979-09-14

Family

ID=26644917

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7433046A Granted FR2393263A1 (fr) 1973-10-01 1974-10-01 Systeme opto-electronique

Country Status (14)

Country Link
US (1) US4074314A (fr)
JP (1) JPS5078341A (fr)
AT (1) AT346111B (fr)
BE (1) BE820575A (fr)
CA (1) CA1032381A (fr)
CH (1) CH591138A5 (fr)
DE (1) DE2445333A1 (fr)
DK (1) DK136794B (fr)
ES (1) ES430497A1 (fr)
FR (1) FR2393263A1 (fr)
GB (1) GB1488691A (fr)
IT (1) IT1022459B (fr)
NO (1) NO743521L (fr)
SE (1) SE404733B (fr)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2325987A1 (fr) * 1975-09-29 1977-04-22 Thomson Brandt Dispositif de lecture optique d'un enregistrement
JPS5922289B2 (ja) * 1975-11-20 1984-05-25 ソニー株式会社 ジヨウホウケンシユツソウチ
NL7608561A (nl) 1976-08-02 1978-02-06 Philips Nv Optische uitleeseenheid voor het aftasten van een registratiedrager voorzien van een stra- lingsreflekterende informatiestruktuur.
JPS5327003A (en) * 1976-08-26 1978-03-13 Toshiba Corp Optical informati on reader
JPS5398802A (en) * 1977-02-09 1978-08-29 Mitsubishi Electric Corp Optical reproducer
US4370679A (en) * 1978-03-27 1983-01-25 Discovision Associates Gain correction system for videodisc player apparatus
US4358796A (en) * 1978-03-27 1982-11-09 Discovision Associates Spindle servo system for videodisc player
SE7813460L (sv) * 1978-03-27 1979-09-28 Mca Disco Vision Videoskivspelare
US4371899A (en) * 1978-03-27 1983-02-01 Discovision Associates Time base error correction system for player
JPS54160212A (en) * 1978-06-09 1979-12-18 Hitachi Ltd Optical head for information processing
JPS5752005A (en) * 1980-08-19 1982-03-27 Olympus Optical Co Ltd Focus detecting method
JPS5746335A (en) * 1980-09-02 1982-03-16 Matsushita Electric Ind Co Ltd Optical parts of optical disk information reproducer
US4376303A (en) * 1980-12-19 1983-03-08 Rca Corporation Quasi-zoom lens optical focus sensor
NL8101668A (nl) * 1981-04-03 1982-11-01 Philips Nv Inrichting voor het detekteren van de positie van een voorwerp.
JPS57195634U (fr) * 1981-06-05 1982-12-11
US4460989A (en) * 1981-06-22 1984-07-17 Eli Soloman Jacobs Apparatus for improving focus during playback of an optical data record
JPS5992457A (ja) * 1982-11-17 1984-05-28 Matsushita Electric Ind Co Ltd 光学式再生装置
JPS6059545A (ja) * 1983-09-12 1985-04-05 Mitsubishi Electric Corp 光ヘッドの焦点ずれ検出装置
NL8304213A (nl) * 1983-12-07 1985-07-01 Philips Nv Enkelvoudige lens met een asferisch oppervlak.
NL8304212A (nl) * 1983-12-07 1984-10-01 Philips Nv Enkelvoudige collimatorlens met een asferisch oppervlak.
US4797868A (en) * 1985-05-15 1989-01-10 Kabushiki Kaisha Toshiba Optical system employing a laser beam for focusing, tracking and transferring information signals with respect to a magneto-optical memory
NL8502802A (nl) * 1985-10-14 1987-05-04 Philips Nv Inrichting voor het uitlezen en/of inschrijven van een optische spoorvormige informatiestruktuur.
JPH06101138B2 (ja) * 1987-03-19 1994-12-12 松下電器産業株式会社 光ヘツド装置
EP0334601B1 (fr) * 1988-03-25 1994-09-07 Tosoh Corporation Dispositif détecteur d'erreurs pour tête optique
JP3238497B2 (ja) * 1992-11-12 2001-12-17 松下電器産業株式会社 光ピックアップヘッド装置
KR100214046B1 (ko) 1995-03-27 1999-08-02 마츠시타 덴끼 산교 가부시키가이샤 초해상 광헤드장치
US6259668B1 (en) * 1996-02-14 2001-07-10 Samsung Electronics Co., Ltd. Recording/reproducing apparatus having an optical pickup device to read from and record information to disks of different thicknesses
US6222812B1 (en) 1996-08-29 2001-04-24 Samsung Electronics Co., Ltd. Optical pickup using an optical phase plate
US6639889B1 (en) 1997-02-13 2003-10-28 Samsung Electronics Co., Ltd. Recording/reproducing apparatus including an optical pickup having an objective lens compatible with a plurality of optical disk formats
US6304540B1 (en) * 1998-03-30 2001-10-16 Samsung Electronics Co., Ltd. Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens
KR20030093683A (ko) * 2002-06-05 2003-12-11 삼성전자주식회사 호환형 광픽업
DE102013003582A1 (de) * 2013-03-01 2013-12-12 Carl Zeiss Sms Gmbh Einzelbildfokussierung mit Stufenplatte

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2759393A (en) * 1952-10-25 1956-08-21 Eastman Kodak Co Optical aligners employing axicons
DE1299134B (de) * 1961-12-20 1969-07-10 Agfa Gevaert Ag Vorrichtung zur Scharfeinstellung und Qualitaetspruefung von Objektiven
JPS42196Y1 (fr) * 1966-04-22 1967-01-09
US3454772A (en) * 1966-12-20 1969-07-08 Hughes Aircraft Co Photoelectric monitoring system for holding the object plane in proper focus
NL172202C (nl) * 1971-03-11 1983-07-18 Philips Nv Inrichting voor het uitlezen van een plaatvormige informatiedrager bevattende in optische vorm gecodeerde beeld- en/of geluidssignalen.
NL160138C (nl) * 1972-05-11 1979-09-17 Philips Nv Inrichting voor het uitlezen van een vlakke registratie- drager.
AR205243A1 (es) * 1972-05-11 1976-04-21 Philips Nv Aparato para la lectura de un portador de grabacion reflector plano
NL7313454A (nl) * 1973-10-01 1975-04-03 Philips Nv Opto-elektronisch stelsel voor het bepalen van een king tussen de werkelijke positie van een stralings kterend vlak in een optisch afbeeldingsstelsel en d ste positie van dit vlak.
NL7402504A (nl) * 1974-02-25 1975-08-27 Philips Nv Inrichting voor het langs optische weg uitlezen van een registratiedrager.
NL7410642A (nl) * 1974-08-08 1976-02-10 Philips Nv Opto-elektronisch fokusseringsdetektiestelsel.

Also Published As

Publication number Publication date
US4074314A (en) 1978-02-14
FR2393263A1 (fr) 1978-12-29
ES430497A1 (es) 1976-10-16
AT346111B (de) 1978-10-25
DE2445333A1 (de) 1975-04-10
AU7373074A (en) 1976-04-01
DK136794B (da) 1977-11-21
CH591138A5 (fr) 1977-09-15
DK512874A (fr) 1975-06-30
ATA784274A (de) 1978-02-15
GB1488691A (en) 1977-10-12
DK136794C (fr) 1978-05-08
SE7412166L (sv) 1975-04-28
CA1032381A (fr) 1978-06-06
JPS5078341A (fr) 1975-06-26
SE404733B (sv) 1978-10-23
BE820575A (fr) 1975-04-01
IT1022459B (it) 1978-03-20
NO743521L (fr) 1975-04-28

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Legal Events

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ST Notification of lapse