JPS50110647A - - Google Patents

Info

Publication number
JPS50110647A
JPS50110647A JP50014942A JP1494275A JPS50110647A JP S50110647 A JPS50110647 A JP S50110647A JP 50014942 A JP50014942 A JP 50014942A JP 1494275 A JP1494275 A JP 1494275A JP S50110647 A JPS50110647 A JP S50110647A
Authority
JP
Japan
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.)
Pending
Application number
JP50014942A
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 filed Critical
Publication of JPS50110647A publication Critical patent/JPS50110647A/ja
Pending legal-status Critical Current

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
    • 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08511—Methods for track change, selection or preliminary positioning by moving the head with focus pull-in 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
    • 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°)
    • 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
JP50014942A 1974-02-09 1975-02-06 Pending JPS50110647A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7401805A NL7401805A (nl) 1974-02-09 1974-02-09 Inrichting voor het instellen van het beeld en informatiestruktuur op een omzetter.

Publications (1)

Publication Number Publication Date
JPS50110647A true JPS50110647A (ja) 1975-08-30

Family

ID=19820723

Family Applications (2)

Application Number Title Priority Date Filing Date
JP50014942A Pending JPS50110647A (ja) 1974-02-09 1975-02-06
JP1981065727U Expired JPS6226813Y2 (ja) 1974-02-09 1981-05-08

Family Applications After (1)

Application Number Title Priority Date Filing Date
JP1981065727U Expired JPS6226813Y2 (ja) 1974-02-09 1981-05-08

Country Status (18)

Country Link
US (1) US3976828A (ja)
JP (2) JPS50110647A (ja)
AR (1) AR203674A1 (ja)
AT (1) AT337267B (ja)
BE (1) BE825328A (ja)
BR (1) BR7500762A (ja)
CA (1) CA1051549A (ja)
CH (1) CH583493A5 (ja)
DE (1) DE2503769C2 (ja)
DK (1) DK137252B (ja)
ES (1) ES434530A1 (ja)
FR (1) FR2260910B1 (ja)
GB (1) GB1498617A (ja)
IT (1) IT1029646B (ja)
NL (1) NL7401805A (ja)
NO (1) NO750384L (ja)
SE (1) SE404449B (ja)
ZA (1) ZA75531B (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5722210A (en) * 1980-07-15 1982-02-05 Canon Inc Optical device
JPS5887513A (ja) * 1981-11-19 1983-05-25 Olympus Optical Co Ltd 焦点検出装置及び合焦位置設定装置
JPS5887514A (ja) * 1981-11-20 1983-05-25 Olympus Optical Co Ltd 焦点検出装置及び合焦位置設定装置
US7027610B1 (en) 1999-07-27 2006-04-11 Murata Manufacturing Co., Ltd. Loudspeaker

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5651059A (en) * 1979-10-01 1981-05-08 Mitsubishi Electric Corp Flexible disc device for both side type
JPS6215864Y2 (ja) * 1980-08-04 1987-04-22
GB2088646B (en) * 1980-10-24 1984-09-12 Sony Corp Pick-up assemblies for disc players
JPS57113428A (en) * 1980-12-29 1982-07-14 Pioneer Video Corp Focus servo device
JPS5877035A (ja) * 1981-10-08 1983-05-10 Mitsubishi Electric Corp 自動焦点引込み装置
JPS5928828U (ja) * 1982-08-17 1984-02-22 パイオニア株式会社 情報検出用スポツト光の集束位置移動制御装置
US5245174A (en) * 1990-10-15 1993-09-14 Applied Magnetics Corporation Focus sensing apparatus utilizing a reflecting surface having variable reflectivity
GB2248989B (en) * 1990-10-15 1995-05-24 Applied Magnetics Corp Focus sensing apparatus and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4866446A (ja) * 1971-12-14 1973-09-12

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581133A (en) * 1950-11-02 1952-01-01 Sound Apparatus Company Graphic recorder with sliding coils
US3391255A (en) * 1962-05-16 1968-07-02 Minnesota Mining & Mfg Transducing system
US3544980A (en) * 1968-03-22 1970-12-01 Peripheral Systems Corp Magnetic recording disc drive with head positioning and collision avoidance apparatus
US3576454A (en) * 1968-03-28 1971-04-27 Ibm Data storage accessing mechanism with moving coil motor
US3521092A (en) * 1968-07-10 1970-07-21 Ibm Data storage extended stroke actuator
FR2126492A5 (ja) * 1971-02-08 1972-10-06 Thomson Csf
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.
US3725764A (en) * 1971-04-01 1973-04-03 Ibm Servo positioning system for magnetic disk memory including radial runout servo compensation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4866446A (ja) * 1971-12-14 1973-09-12

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5722210A (en) * 1980-07-15 1982-02-05 Canon Inc Optical device
JPS6342761B2 (ja) * 1980-07-15 1988-08-25 Canon Kk
JPS5887513A (ja) * 1981-11-19 1983-05-25 Olympus Optical Co Ltd 焦点検出装置及び合焦位置設定装置
JPH0478966B2 (ja) * 1981-11-19 1992-12-14 Olympus Optical Co
JPS5887514A (ja) * 1981-11-20 1983-05-25 Olympus Optical Co Ltd 焦点検出装置及び合焦位置設定装置
JPH0478967B2 (ja) * 1981-11-20 1992-12-14 Olympus Optical Co
US7027610B1 (en) 1999-07-27 2006-04-11 Murata Manufacturing Co., Ltd. Loudspeaker

Also Published As

Publication number Publication date
ES434530A1 (es) 1976-12-16
NO750384L (ja) 1975-08-12
DK137252C (ja) 1978-07-10
JPS6226813Y2 (ja) 1987-07-09
SE7501292L (ja) 1975-08-11
DE2503769A1 (de) 1975-08-14
GB1498617A (en) 1978-01-25
AU7791475A (en) 1976-08-05
BR7500762A (pt) 1975-11-25
CA1051549A (en) 1979-03-27
ZA75531B (en) 1976-08-25
BE825328A (fr) 1975-08-07
IT1029646B (it) 1979-03-20
DK137252B (da) 1978-02-06
NL7401805A (nl) 1975-08-12
JPS57841U (ja) 1982-01-05
AT337267B (de) 1977-06-27
ATA91075A (de) 1976-10-15
CH583493A5 (ja) 1976-12-31
AR203674A1 (es) 1975-09-30
DK39475A (ja) 1975-10-06
US3976828A (en) 1976-08-24
SE404449B (sv) 1978-10-02
FR2260910B1 (ja) 1982-03-05
FR2260910A1 (ja) 1975-09-05
DE2503769C2 (de) 1984-03-08

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