JPS5535777B2 - - Google Patents

Info

Publication number
JPS5535777B2
JPS5535777B2 JP13931375A JP13931375A JPS5535777B2 JP S5535777 B2 JPS5535777 B2 JP S5535777B2 JP 13931375 A JP13931375 A JP 13931375A JP 13931375 A JP13931375 A JP 13931375A JP S5535777 B2 JPS5535777 B2 JP S5535777B2
Authority
JP
Japan
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
JP13931375A
Other languages
Japanese (ja)
Other versions
JPS5264215A (en
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 filed Critical
Priority to JP50139313A priority Critical patent/JPS5264215A/en
Priority to DE2652795A priority patent/DE2652795C2/en
Publication of JPS5264215A publication Critical patent/JPS5264215A/en
Publication of JPS5535777B2 publication Critical patent/JPS5535777B2/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
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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
JP50139313A 1975-11-21 1975-11-21 Optical signal reader Granted JPS5264215A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP50139313A JPS5264215A (en) 1975-11-21 1975-11-21 Optical signal reader
DE2652795A DE2652795C2 (en) 1975-11-21 1976-11-19 Apparatus for optically scanning signals located on a rotatable recording disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50139313A JPS5264215A (en) 1975-11-21 1975-11-21 Optical signal reader

Publications (2)

Publication Number Publication Date
JPS5264215A JPS5264215A (en) 1977-05-27
JPS5535777B2 true JPS5535777B2 (en) 1980-09-17

Family

ID=15242382

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50139313A Granted JPS5264215A (en) 1975-11-21 1975-11-21 Optical signal reader

Country Status (2)

Country Link
JP (1) JPS5264215A (en)
DE (1) DE2652795C2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4264986A (en) * 1979-03-12 1981-04-28 Willis Craig I Information-recording process & apparatus
GB2046480A (en) * 1979-03-27 1980-11-12 Tokyo Shibaura Electric Co Tracking servo and playback system for video disc
US4333173A (en) * 1979-06-15 1982-06-01 Hitachi, Ltd. Optical information processor with prismatic correction of laser beam shape
NL8103505A (en) * 1981-07-24 1983-02-16 Philips Nv DEVICE FOR POINT SCANNING OF AN OBJECT.
NL8104946A (en) * 1981-11-02 1983-06-01 Philips Nv DEVICE FOR READING AND / OR RECORDING AN OPTICALLY READABLE INFORMATION STRUCTURE ON A RECORD CARRIER.
US4534021A (en) * 1981-12-10 1985-08-06 Discovision Associates Angularly multiplexed optical recording medium
JPS59167860A (en) * 1983-03-12 1984-09-21 Aiwa Co Ltd Optical disc reproducing device
JPS6325833A (en) * 1986-07-17 1988-02-03 Fujitsu Ltd Optical head
US5161134A (en) * 1989-06-29 1992-11-03 Digital Equipment Corporation Method for increasing linear bit density in magneto-optical storage media

Also Published As

Publication number Publication date
JPS5264215A (en) 1977-05-27
DE2652795A1 (en) 1977-05-26
DE2652795C2 (en) 1984-12-20

Similar Documents

Publication Publication Date Title
JPS5313831B2 (en)
JPS5330844B2 (en)
FR2310760B1 (en)
ATA280176A (en)
JPS525688U (en)
JPS54128Y2 (en)
JPS5630052Y2 (en)
JPS5747973B2 (en)
JPS5639495B2 (en)
JPS5190126A (en)
JPS521389U (en)
JPS5639809Y2 (en)
JPS5419433Y2 (en)
JPS5723393Y2 (en)
JPS554362Y2 (en)
JPS5426886Y2 (en)
JPS557215B2 (en)
JPS5212999U (en)
JPS5214378U (en)
JPS51162740U (en)
JPS51132879U (en)
JPS51128088U (en)
CS177699B1 (en)
BG23074A1 (en)
BG22103A1 (en)