CA1181174A - Systeme optique a deux longueurs d'onde - Google Patents

Systeme optique a deux longueurs d'onde

Info

Publication number
CA1181174A
CA1181174A CA000415234A CA415234A CA1181174A CA 1181174 A CA1181174 A CA 1181174A CA 000415234 A CA000415234 A CA 000415234A CA 415234 A CA415234 A CA 415234A CA 1181174 A CA1181174 A CA 1181174A
Authority
CA
Canada
Prior art keywords
read
light
incident
lambda
optical system
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
Application number
CA000415234A
Other languages
English (en)
Inventor
Keith D. Anderson
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to CA000415234A priority Critical patent/CA1181174A/fr
Application granted granted Critical
Publication of CA1181174A publication Critical patent/CA1181174A/fr
Expired 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
CA000415234A 1982-11-09 1982-11-09 Systeme optique a deux longueurs d'onde Expired CA1181174A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000415234A CA1181174A (fr) 1982-11-09 1982-11-09 Systeme optique a deux longueurs d'onde

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000415234A CA1181174A (fr) 1982-11-09 1982-11-09 Systeme optique a deux longueurs d'onde

Publications (1)

Publication Number Publication Date
CA1181174A true CA1181174A (fr) 1985-01-15

Family

ID=4123917

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000415234A Expired CA1181174A (fr) 1982-11-09 1982-11-09 Systeme optique a deux longueurs d'onde

Country Status (1)

Country Link
CA (1) CA1181174A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103567631A (zh) * 2013-11-15 2014-02-12 深圳市大族激光科技股份有限公司 光学隔离系统及光学隔离器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103567631A (zh) * 2013-11-15 2014-02-12 深圳市大族激光科技股份有限公司 光学隔离系统及光学隔离器
CN103567631B (zh) * 2013-11-15 2015-09-09 大族激光科技产业集团股份有限公司 光学隔离系统及光学隔离器

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Legal Events

Date Code Title Description
MKEC Expiry (correction)
MKEX Expiry