FR2224834B1 - - Google Patents

Info

Publication number
FR2224834B1
FR2224834B1 FR7408775A FR7408775A FR2224834B1 FR 2224834 B1 FR2224834 B1 FR 2224834B1 FR 7408775 A FR7408775 A FR 7408775A FR 7408775 A FR7408775 A FR 7408775A FR 2224834 B1 FR2224834 B1 FR 2224834B1
Authority
FR
France
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
FR7408775A
Other versions
FR2224834A1 (fr
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2224834A1 publication Critical patent/FR2224834A1/fr
Application granted granted Critical
Publication of FR2224834B1 publication Critical patent/FR2224834B1/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
    • G11B7/13—Optical detectors therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
    • G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
    • G11C13/048—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using other optical storage elements

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)
  • Optical Recording Or Reproduction (AREA)
FR7408775A 1973-04-09 1974-03-05 Expired FR2224834B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00349170A US3812477A (en) 1973-04-09 1973-04-09 Method for superresolution in an optical memory

Publications (2)

Publication Number Publication Date
FR2224834A1 FR2224834A1 (fr) 1974-10-31
FR2224834B1 true FR2224834B1 (fr) 1977-09-30

Family

ID=23371198

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7408775A Expired FR2224834B1 (fr) 1973-04-09 1974-03-05

Country Status (5)

Country Link
US (1) US3812477A (fr)
JP (1) JPS49131459A (fr)
DE (1) DE2415625A1 (fr)
FR (1) FR2224834B1 (fr)
GB (1) GB1417374A (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7312139A (fr) * 1972-09-08 1974-03-12
US4190775A (en) * 1975-02-18 1980-02-26 Agency Of Industrial Science & Technology Optical memory playback apparatus
NL7608561A (nl) * 1976-08-02 1978-02-06 Philips Nv Optische uitleeseenheid voor het aftasten van een registratiedrager voorzien van een stra- lingsreflekterende informatiestruktuur.
JPS5483848A (en) * 1977-12-16 1979-07-04 Mitsubishi Electric Corp Automatic focusing device
US4189735A (en) * 1978-02-24 1980-02-19 Rca Corporation Record playback apparatus and information record therefor
NL7811003A (nl) * 1978-11-06 1980-05-08 Philips Nv Schijfvormige, optisch uitleesbare registratiedrager, als opslagmedium voor data-informatie.
DE3027318C2 (de) * 1979-08-03 1983-05-05 Hitachi, Ltd., Tokyo Optisches Abtastsystem
US4562569A (en) * 1982-01-05 1985-12-31 California Institute Of Technology Tandem coupled cavity lasers with separate current control and high parasitic resistance between them for bistability and negative resistance characteristics and use thereof for optical disc readout
US5012407A (en) * 1984-12-11 1991-04-30 Finn Charles A Computer system which accesses operating system information and command handlers from optical storage via an auxiliary processor and cache memory
US5247510A (en) * 1990-06-29 1993-09-21 Digital Equipment Corporation Increasing storage density of optical data media by detecting a selected portion of a light spot image corresponding to a single domain
US5268564A (en) 1990-08-03 1993-12-07 Symbol Technologies, Inc. Bar code scanner actuated by detection of scanner motion

Also Published As

Publication number Publication date
FR2224834A1 (fr) 1974-10-31
DE2415625A1 (de) 1974-10-17
JPS49131459A (fr) 1974-12-17
US3812477A (en) 1974-05-21
GB1417374A (en) 1975-12-10

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Legal Events

Date Code Title Description
ST Notification of lapse