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JPS5246827A - System for reproducing information - Google Patents

System for reproducing information

Info

Publication number
JPS5246827A
JPS5246827A JP12181175A JP12181175A JPS5246827A JP S5246827 A JPS5246827 A JP S5246827A JP 12181175 A JP12181175 A JP 12181175A JP 12181175 A JP12181175 A JP 12181175A JP S5246827 A JPS5246827 A JP S5246827A
Authority
JP
Japan
Prior art keywords
reproducing information
render
irradiating
simplify
aid
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
JP12181175A
Other languages
Japanese (ja)
Inventor
Yoshito Tsunoda
Takeshi Maeda
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 JP12181175A priority Critical patent/JPS5246827A/en
Publication of JPS5246827A publication Critical patent/JPS5246827A/en
Pending legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: To render it possible to simplify a structure of positive performance by irradiating a track such as video disc with the aid of laser light emitted from semiconductor luminous elements arranged on the same substrate in such a way that they form three or more luminous zones.
COPYRIGHT: (C)1977,JPO&Japio
JP12181175A 1975-10-11 1975-10-11 System for reproducing information Pending JPS5246827A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12181175A JPS5246827A (en) 1975-10-11 1975-10-11 System for reproducing information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12181175A JPS5246827A (en) 1975-10-11 1975-10-11 System for reproducing information

Publications (1)

Publication Number Publication Date
JPS5246827A true JPS5246827A (en) 1977-04-14

Family

ID=14820503

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12181175A Pending JPS5246827A (en) 1975-10-11 1975-10-11 System for reproducing information

Country Status (1)

Country Link
JP (1) JPS5246827A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02134735A (en) * 1988-11-15 1990-05-23 Canon Inc Manufacture of optical head, semiconductor laser and laser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02134735A (en) * 1988-11-15 1990-05-23 Canon Inc Manufacture of optical head, semiconductor laser and laser

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