AT350121B - Optische signalwiedergabevorrichtung mit auto- matischer fokussierung eines lichtstrahls auf die oberflaeche des aufzeichnungstraegers - Google Patents

Optische signalwiedergabevorrichtung mit auto- matischer fokussierung eines lichtstrahls auf die oberflaeche des aufzeichnungstraegers

Info

Publication number
AT350121B
AT350121B AT167377A AT167377A AT350121B AT 350121 B AT350121 B AT 350121B AT 167377 A AT167377 A AT 167377A AT 167377 A AT167377 A AT 167377A AT 350121 B AT350121 B AT 350121B
Authority
AT
Austria
Prior art keywords
light beam
optical signal
recording media
automatic focusing
replay device
Prior art date
Application number
AT167377A
Other languages
English (en)
Other versions
ATA167377A (de
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of ATA167377A publication Critical patent/ATA167377A/de
Application granted granted Critical
Publication of AT350121B publication Critical patent/AT350121B/de

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
AT167377A 1976-03-11 1977-03-11 Optische signalwiedergabevorrichtung mit auto- matischer fokussierung eines lichtstrahls auf die oberflaeche des aufzeichnungstraegers AT350121B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2631076A JPS52109954A (en) 1976-03-11 1976-03-11 Optical signal reader

Publications (2)

Publication Number Publication Date
ATA167377A ATA167377A (de) 1978-10-15
AT350121B true AT350121B (de) 1979-05-10

Family

ID=12189789

Family Applications (1)

Application Number Title Priority Date Filing Date
AT167377A AT350121B (de) 1976-03-11 1977-03-11 Optische signalwiedergabevorrichtung mit auto- matischer fokussierung eines lichtstrahls auf die oberflaeche des aufzeichnungstraegers

Country Status (9)

Country Link
US (1) US4115808A (de)
JP (1) JPS52109954A (de)
AT (1) AT350121B (de)
AU (1) AU502381B2 (de)
CA (1) CA1095618A (de)
DE (1) DE2710755C2 (de)
FR (1) FR2344075A1 (de)
GB (1) GB1563070A (de)
NL (1) NL7702680A (de)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5235591A (en) * 1990-01-19 1993-08-10 Hitachi, Ltd. Stack type optical disc apparatus, sealed and separate type optical head therefor and optical disc medium
US5053612A (en) * 1990-03-28 1991-10-01 Tech-S, Inc. Barcode badge and ticket reader employing beam splitting
US6088309A (en) * 1998-02-13 2000-07-11 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, a method for controlling vertical laser alignment
US6222813B1 (en) 1998-02-13 2001-04-24 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for controlling vertical laser alignment
US6111830A (en) * 1998-02-13 2000-08-29 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for determining linear and/or angular velocity
US6088306A (en) * 1998-02-13 2000-07-11 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for combined writing and reading operations
US6049512A (en) * 1998-02-13 2000-04-11 International Business Machines Corporation In a system for creating, reading and writing on rotatable information storage media, an apparatus for two-sided writing
US6081487A (en) * 1998-02-13 2000-06-27 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for controlling laser positioning
US6097677A (en) * 1998-02-13 2000-08-01 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, a method for combined writing and reading operations
US6108282A (en) * 1998-02-13 2000-08-22 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for multilayer laser source positioning
US6081489A (en) * 1998-02-13 2000-06-27 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for performing both read and write operations
US6034929A (en) * 1998-02-13 2000-03-07 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, a method for multi-layer laser source positioning
US6128262A (en) * 1998-02-13 2000-10-03 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, a method for customizing said media with timing information
US6118740A (en) * 1998-02-13 2000-09-12 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, a method for writing closely spaced information tracks
US6046970A (en) * 1998-02-13 2000-04-04 International Business Machines Corporation System for creating, reading and writing on rotatable storage media, an apparatus for determining laser aging characteristics
US6097681A (en) * 1998-02-13 2000-08-01 International Business Machines Corporation System for creating, reading and writing on rotatable information storage media, an apparatus for determining angular position, θ
US6996251B2 (en) * 2002-09-30 2006-02-07 Myport Technologies, Inc. Forensic communication apparatus and method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932701A (en) * 1975-01-29 1976-01-13 Zenith Radio Corporation Self-compensating focus system for a reflective video disc
US3959581A (en) * 1975-01-29 1976-05-25 Zenith Radio Corporation Self-compensating focus system for optical video playback device

Also Published As

Publication number Publication date
US4115808A (en) 1978-09-19
JPS52109954A (en) 1977-09-14
CA1095618A (en) 1981-02-10
DE2710755C2 (de) 1985-08-22
FR2344075A1 (fr) 1977-10-07
ATA167377A (de) 1978-10-15
DE2710755A1 (de) 1977-09-22
NL7702680A (nl) 1977-09-13
AU502381B2 (en) 1979-07-26
JPS5535776B2 (de) 1980-09-17
GB1563070A (en) 1980-03-19
AU2317377A (en) 1978-09-14
FR2344075B1 (de) 1982-07-02

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Legal Events

Date Code Title Description
ELA Expired due to lapse of time
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee