ZA754359B - Opto-electronic focus detection system - Google Patents

Opto-electronic focus detection system

Info

Publication number
ZA754359B
ZA754359B ZA754359A ZA754359A ZA754359B ZA 754359 B ZA754359 B ZA 754359B ZA 754359 A ZA754359 A ZA 754359A ZA 754359 A ZA754359 A ZA 754359A ZA 754359 B ZA754359 B ZA 754359B
Authority
ZA
South Africa
Prior art keywords
opto
detection system
focus detection
electronic focus
electronic
Prior art date
Application number
ZA754359A
Other languages
English (en)
Inventor
G Gerritsen
G Van Rosmalen
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.)
Filing date
Publication date
Application filed by Philips Nv filed Critical Philips Nv
Publication of ZA754359B publication Critical patent/ZA754359B/xx

Links

Classifications

    • 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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
    • 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
    • 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
    • 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°)

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
ZA754359A 1974-08-08 1975-07-08 Opto-electronic focus detection system ZA754359B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7410642A NL7410642A (nl) 1974-08-08 1974-08-08 Opto-elektronisch fokusseringsdetektiestelsel.

Publications (1)

Publication Number Publication Date
ZA754359B true ZA754359B (en) 1977-02-23

Family

ID=19821884

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA754359A ZA754359B (en) 1974-08-08 1975-07-08 Opto-electronic focus detection system

Country Status (19)

Country Link
US (1) US3969575A (xx)
JP (1) JPS5250133B2 (xx)
AR (1) AR206156A1 (xx)
AT (1) AT346097B (xx)
AU (1) AU497551B2 (xx)
BE (1) BE832185A (xx)
BR (1) BR7504984A (xx)
CA (1) CA1035182A (xx)
CH (1) CH597669A5 (xx)
DK (1) DK137101B (xx)
ES (1) ES440060A1 (xx)
FR (1) FR2281622A1 (xx)
GB (1) GB1515177A (xx)
IT (1) IT1041489B (xx)
NL (1) NL7410642A (xx)
NO (1) NO752747L (xx)
PL (1) PL104485B1 (xx)
SE (1) SE410909B (xx)
ZA (1) ZA754359B (xx)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2445333A1 (de) * 1973-10-01 1975-04-10 Philips Nv Optoelektronisches system zur bestimmung einer abweichung zwischen der istlage und der sollage einer ebene in einem optischen abbildungssystem
JPS5855567B2 (ja) * 1975-06-06 1983-12-10 株式会社日立製作所 ジヨウホウサイセイホウシキ
JPS5274219A (en) * 1975-12-17 1977-06-22 Mansei Kogyo Kk Device for preventing displacement of focal point of optical information reader
JPS52134704A (en) * 1976-05-06 1977-11-11 Teac Co Optical recorder/reproducer unit
JPS5828654B2 (ja) * 1976-07-27 1983-06-17 三菱電機株式会社 光学的記録再生機の間隔検出装置
JPS606014B2 (ja) * 1976-10-07 1985-02-15 ソニー株式会社 情報検出装置
US4410968A (en) * 1977-03-24 1983-10-18 Thomas Lee Siwecki Method and apparatus for recording on a disk supported deformable metallic film
JPS53123103A (en) * 1977-04-02 1978-10-27 Mansei Kogyo Kk Optical information reader
JPS5845095B2 (ja) * 1977-04-28 1983-10-07 松下電器産業株式会社 情報再生装置
JPS5823979Y2 (ja) * 1978-01-24 1983-05-23 ヤンマーディーゼル株式会社 内燃機関のチエン始動装置
JPS54124705A (en) * 1978-03-20 1979-09-27 Teac Corp Optical reproducer
JPS54133305A (en) * 1978-04-07 1979-10-17 Hitachi Ltd Information recorder
JPS54146613A (en) * 1978-05-10 1979-11-16 Hitachi Ltd Optical head
JPS54160212A (en) * 1978-06-09 1979-12-18 Hitachi Ltd Optical head for information processing
JPS56116004A (en) * 1980-02-20 1981-09-11 Olympus Optical Co Ltd Lens for video disk
US4406526A (en) * 1980-05-19 1983-09-27 Vickers Limited Focusing of optical viewing apparatus
US4376303A (en) * 1980-12-19 1983-03-08 Rca Corporation Quasi-zoom lens optical focus sensor
US4530080A (en) * 1981-04-07 1985-07-16 Tdk Electronics Co., Ltd. Optical recording/reproducing system
EP0068390B1 (en) * 1981-06-22 1990-08-22 Kabushiki Kaisha Toshiba An optical head
JPS5849298A (ja) * 1981-09-18 1983-03-23 旭光学工業株式会社 フォト自動製図機における自動合焦装置
US4538062A (en) * 1981-11-19 1985-08-27 Olympus Optical Co., Ltd. Focusing detecting device with coaxial source and detector
FR2520137B1 (fr) * 1982-01-21 1986-10-31 Deude Rene Systeme opto-electronique monobloc inviolable permettant la detection, le controle, informant d'une maniere analogique, numerique et tout ou rien
US4556787A (en) * 1982-03-23 1985-12-03 Olympus Optical Co., Ltd. Photosensor for optical observing or photographing devices
EP0096570B1 (en) * 1982-06-05 1988-08-24 Olympus Optical Co., Ltd. An optical system focus-state detector
DE3382020D1 (de) * 1982-07-15 1991-01-10 Matsushita Electric Ind Co Ltd Kopf zum optischen aufzeichnen und wiedergeben.
JPS59167855A (ja) * 1983-03-14 1984-09-21 Canon Inc 情報記録再生装置
DE3503461A1 (de) * 1984-02-03 1985-08-08 Pioneer Electronic Corp., Tokio/Tokyo Geraet zum wiedergeben gespeicherter information
JPS60132616U (ja) * 1984-02-13 1985-09-04 パイオニア株式会社 記録装置
US4700336A (en) * 1984-06-19 1987-10-13 Matsushita Electric Industrial Co., Ltd. Optical recording and playback apparatus using plural light spots
US4891799A (en) * 1987-03-13 1990-01-02 Fuji Electrochemical Co., Ltd. Optical head apparatus for writing and reading data on an optical disk having a lens with an inclined optical axis
US5079432A (en) * 1990-06-25 1992-01-07 Ampex Corporation Method and apparatus for measuring the displacement of an automatic scan tracking head
JP3019835B2 (ja) * 1998-04-22 2000-03-13 日本電気株式会社 焦点検出装置
US6720567B2 (en) * 2001-01-30 2004-04-13 Gsi Lumonics Corporation Apparatus and method for focal point control for laser machining
JP4212522B2 (ja) * 2004-07-06 2009-01-21 太陽誘電株式会社 ピックアップ装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2550685A (en) * 1945-10-25 1951-05-01 Garutso Inc Optical objective balance assembly
US3012469A (en) * 1959-06-01 1961-12-12 Pullman Inc Aligning device
AR205243A1 (es) * 1972-05-11 1976-04-21 Philips Nv Aparato para la lectura de un portador de grabacion reflector plano

Also Published As

Publication number Publication date
AU8367275A (en) 1977-02-10
DE2533501A1 (de) 1976-02-26
AT346097B (de) 1978-10-25
ATA606375A (de) 1978-02-15
BR7504984A (pt) 1976-08-03
FR2281622B1 (xx) 1980-07-18
PL104485B1 (pl) 1979-08-31
CH597669A5 (xx) 1978-04-14
CA1035182A (en) 1978-07-25
DE2533501B2 (de) 1976-10-14
JPS5250133B2 (xx) 1977-12-22
BE832185A (fr) 1976-02-06
NO752747L (xx) 1976-02-10
SE7508800L (sv) 1976-02-09
JPS5143948A (xx) 1976-04-15
IT1041489B (it) 1980-01-10
FR2281622A1 (fr) 1976-03-05
GB1515177A (en) 1978-06-21
US3969575A (en) 1976-07-13
AR206156A1 (es) 1976-06-30
SE410909B (sv) 1979-11-12
AU497551B2 (en) 1978-12-14
DK354975A (xx) 1976-02-09
ES440060A1 (es) 1977-02-16
NL7410642A (nl) 1976-02-10
DK137101C (xx) 1978-08-07
DK137101B (da) 1978-01-16

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