JPH0221059B2 - - Google Patents

Info

Publication number
JPH0221059B2
JPH0221059B2 JP58150270A JP15027083A JPH0221059B2 JP H0221059 B2 JPH0221059 B2 JP H0221059B2 JP 58150270 A JP58150270 A JP 58150270A JP 15027083 A JP15027083 A JP 15027083A JP H0221059 B2 JPH0221059 B2 JP H0221059B2
Authority
JP
Japan
Prior art keywords
objective lens
optical
light beam
optical axis
beam splitter
Prior art date
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 - Lifetime
Application number
JP58150270A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6043237A (ja
Inventor
Akinori Watabe
Kikuji Kato
Yoshinori Isomura
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP58150270A priority Critical patent/JPS6043237A/ja
Publication of JPS6043237A publication Critical patent/JPS6043237A/ja
Publication of JPH0221059B2 publication Critical patent/JPH0221059B2/ja
Granted legal-status Critical Current

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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
JP58150270A 1983-08-19 1983-08-19 光学ヘツド Granted JPS6043237A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58150270A JPS6043237A (ja) 1983-08-19 1983-08-19 光学ヘツド

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58150270A JPS6043237A (ja) 1983-08-19 1983-08-19 光学ヘツド

Publications (2)

Publication Number Publication Date
JPS6043237A JPS6043237A (ja) 1985-03-07
JPH0221059B2 true JPH0221059B2 (en]) 1990-05-11

Family

ID=15493272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58150270A Granted JPS6043237A (ja) 1983-08-19 1983-08-19 光学ヘツド

Country Status (1)

Country Link
JP (1) JPS6043237A (en])

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55150142A (en) * 1979-05-07 1980-11-21 Sony Corp Optical signal reproducing head

Also Published As

Publication number Publication date
JPS6043237A (ja) 1985-03-07

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