GB1421835A - Optical data storage devices - Google Patents

Optical data storage devices

Info

Publication number
GB1421835A
GB1421835A GB690473A GB690473A GB1421835A GB 1421835 A GB1421835 A GB 1421835A GB 690473 A GB690473 A GB 690473A GB 690473 A GB690473 A GB 690473A GB 1421835 A GB1421835 A GB 1421835A
Authority
GB
United Kingdom
Prior art keywords
data storage
optical data
light
storage devices
gives
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
GB690473A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1421835A publication Critical patent/GB1421835A/en
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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0065—Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
    • 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

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Holo Graphy (AREA)

Abstract

1421835 Optical data storage SIEMENS AG 13 Feb 1973 [30 March 1972] 6904/73 Heading G2J A beam of light is pulse amplitude modulated by data (e.g. in the form of a Fourier transform) and recorded on a photo-sensitive medium with successive bits of data partly overlapping. It is read out by a scanning beam shone through the record and a matched optical filter that gives a sharp output peak at correlation. This peak is detected and gives an output. Incoherent light may be employed. Any unmodulated light in the read-out may be removed by an additional filter.
GB690473A 1972-03-30 1973-02-13 Optical data storage devices Expired GB1421835A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722215746 DE2215746A1 (en) 1972-03-30 1972-03-30 PROCEDURE FOR SEQUENTIAL RECORDING AND READING OF DATA ON A MEMORY TAPE

Publications (1)

Publication Number Publication Date
GB1421835A true GB1421835A (en) 1976-01-21

Family

ID=5840736

Family Applications (1)

Application Number Title Priority Date Filing Date
GB690473A Expired GB1421835A (en) 1972-03-30 1973-02-13 Optical data storage devices

Country Status (9)

Country Link
JP (1) JPS4917253A (en)
BE (1) BE797599A (en)
CA (1) CA1025117A (en)
DE (1) DE2215746A1 (en)
FR (1) FR2178186B1 (en)
GB (1) GB1421835A (en)
IT (1) IT981647B (en)
LU (1) LU67321A1 (en)
NL (1) NL7302425A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006015608A1 (en) * 2006-04-04 2007-10-18 Tesa Scribos Gmbh Method and apparatus for reading a computer generated hologram

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006015608A1 (en) * 2006-04-04 2007-10-18 Tesa Scribos Gmbh Method and apparatus for reading a computer generated hologram

Also Published As

Publication number Publication date
JPS4917253A (en) 1974-02-15
BE797599A (en) 1973-07-16
FR2178186A1 (en) 1973-11-09
DE2215746A1 (en) 1973-10-11
NL7302425A (en) 1973-10-02
FR2178186B1 (en) 1977-02-04
IT981647B (en) 1974-10-10
LU67321A1 (en) 1973-06-15
CA1025117A (en) 1978-01-24

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee