ZA822011B - Apparatus for recording and reading information tracks in an optical record carrier - Google Patents

Apparatus for recording and reading information tracks in an optical record carrier

Info

Publication number
ZA822011B
ZA822011B ZA822011A ZA822011A ZA822011B ZA 822011 B ZA822011 B ZA 822011B ZA 822011 A ZA822011 A ZA 822011A ZA 822011 A ZA822011 A ZA 822011A ZA 822011 B ZA822011 B ZA 822011B
Authority
ZA
South Africa
Prior art keywords
recording
record carrier
reading information
optical record
information tracks
Prior art date
Application number
ZA822011A
Other languages
English (en)
Inventor
Willem Gerard Opheij
Gerard Eduard 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 ZA822011B publication Critical patent/ZA822011B/xx

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
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
ZA822011A 1981-04-21 1982-03-24 Apparatus for recording and reading information tracks in an optical record carrier ZA822011B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8101932A NL8101932A (nl) 1981-04-21 1981-04-21 Inrichting voor het inschrijven en uitlezen van informatiesporen in een optische registratiedrager.

Publications (1)

Publication Number Publication Date
ZA822011B true ZA822011B (en) 1983-11-30

Family

ID=19837384

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA822011A ZA822011B (en) 1981-04-21 1982-03-24 Apparatus for recording and reading information tracks in an optical record carrier

Country Status (15)

Country Link
US (1) US4546463A (xx)
JP (1) JPS57181441A (xx)
AT (1) AT373424B (xx)
AU (1) AU548804B2 (xx)
BE (1) BE892901A (xx)
CA (1) CA1193721A (xx)
CH (1) CH660810A5 (xx)
DE (1) DE3214188A1 (xx)
ES (1) ES8305144A1 (xx)
FR (1) FR2504300B1 (xx)
GB (1) GB2097150B (xx)
IT (1) IT1210875B (xx)
NL (1) NL8101932A (xx)
SE (1) SE453542B (xx)
ZA (1) ZA822011B (xx)

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US4799210A (en) * 1986-11-05 1989-01-17 Unisys Corporation Fiber optic read/write head for an optical disk memory system
JPS63102031U (xx) * 1986-12-22 1988-07-02
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FR2613866B1 (fr) * 1987-04-07 1994-01-14 Mitsubishi Denki Kk Appareil d'enregistrement et de reproduction optique d'information
JPH073710B2 (ja) * 1987-06-17 1995-01-18 日本電気株式会社 光磁気ディスク装置
JP2561668B2 (ja) * 1987-06-22 1996-12-11 株式会社日立製作所 ２レ−ザ光ヘッド
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JP2657413B2 (ja) * 1989-03-03 1997-09-24 パイオニア株式会社 光ヘッド
JP2517122B2 (ja) * 1989-10-20 1996-07-24 松下電器産業株式会社 ビデオディスク記録装置およびビデオディスク再生装置
JP2962363B2 (ja) * 1990-04-28 1999-10-12 三菱電機株式会社 光ヘッド
JPH0447532A (ja) * 1990-06-15 1992-02-17 Mitsubishi Electric Corp 光学式ヘッド
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FR2470391A1 (fr) * 1979-11-21 1981-05-29 Thomson Csf Dispositif optique stigmatique d'emission-reception de rayonnements coherents et tete optique d'enregistrement-lecture comprenant un tel dispositif
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FR2498752B1 (fr) * 1981-01-23 1985-07-05 Thomson Csf Dispositif optique d'enregistrement lecture d'un support d'information comportant deux sources laser de longueurs d'ondes differentes

Also Published As

Publication number Publication date
JPS57181441A (en) 1982-11-08
SE453542B (sv) 1988-02-08
IT1210875B (it) 1989-09-29
FR2504300B1 (fr) 1988-01-15
GB2097150A (en) 1982-10-27
AT373424B (de) 1984-01-25
ES511506A0 (es) 1983-03-16
CH660810A5 (de) 1987-06-15
US4546463A (en) 1985-10-08
ATA155782A (de) 1983-05-15
AU548804B2 (en) 1986-01-02
CA1193721A (en) 1985-09-17
NL8101932A (nl) 1982-11-16
FR2504300A1 (fr) 1982-10-22
GB2097150B (en) 1984-11-07
SE8202411L (sv) 1982-10-22
ES8305144A1 (es) 1983-03-16
IT8220798A0 (it) 1982-04-16
DE3214188A1 (de) 1982-11-11
AU8281182A (en) 1982-10-28
JPH0467261B2 (xx) 1992-10-27
DE3214188C2 (xx) 1992-10-08
BE892901A (fr) 1982-10-19

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