JPS51134515A - Photo-video disc - Google Patents

Photo-video disc

Info

Publication number
JPS51134515A
JPS51134515A JP50058595A JP5859575A JPS51134515A JP S51134515 A JPS51134515 A JP S51134515A JP 50058595 A JP50058595 A JP 50058595A JP 5859575 A JP5859575 A JP 5859575A JP S51134515 A JPS51134515 A JP S51134515A
Authority
JP
Japan
Prior art keywords
video disc
photo
doubling
video
disc
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.)
Pending
Application number
JP50058595A
Other languages
Japanese (ja)
Inventor
Toshihisa Tsukada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP50058595A priority Critical patent/JPS51134515A/en
Publication of JPS51134515A publication Critical patent/JPS51134515A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Head (AREA)

Abstract

PURPOSE: Doubling of the playing time of video disc.
COPYRIGHT: (C)1976,JPO&Japio
JP50058595A 1975-05-19 1975-05-19 Photo-video disc Pending JPS51134515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50058595A JPS51134515A (en) 1975-05-19 1975-05-19 Photo-video disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50058595A JPS51134515A (en) 1975-05-19 1975-05-19 Photo-video disc

Publications (1)

Publication Number Publication Date
JPS51134515A true JPS51134515A (en) 1976-11-22

Family

ID=13088836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50058595A Pending JPS51134515A (en) 1975-05-19 1975-05-19 Photo-video disc

Country Status (1)

Country Link
JP (1) JPS51134515A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55130512A (en) * 1979-03-30 1980-10-09 Canon Inc Semiconductor laser optical system
JPS57188481U (en) * 1981-05-22 1982-11-30

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55130512A (en) * 1979-03-30 1980-10-09 Canon Inc Semiconductor laser optical system
JPS6361646B2 (en) * 1979-03-30 1988-11-29
JPS57188481U (en) * 1981-05-22 1982-11-30
JPS633270Y2 (en) * 1981-05-22 1988-01-27

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