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JPS51148441A - Semiconductor-leser pickup device - Google Patents

Semiconductor-leser pickup device

Info

Publication number
JPS51148441A
JPS51148441A JP50071946A JP7194675A JPS51148441A JP S51148441 A JPS51148441 A JP S51148441A JP 50071946 A JP50071946 A JP 50071946A JP 7194675 A JP7194675 A JP 7194675A JP S51148441 A JPS51148441 A JP S51148441A
Authority
JP
Japan
Prior art keywords
leser
semiconductor
pickup device
read
optical
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.)
Granted
Application number
JP50071946A
Other languages
Japanese (ja)
Other versions
JPS5918772B2 (en
Inventor
Yoshisada Oshida
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 JP50071946A priority Critical patent/JPS5918772B2/en
Publication of JPS51148441A publication Critical patent/JPS51148441A/en
Publication of JPS5918772B2 publication Critical patent/JPS5918772B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE: In order to obtain a optical read-out device with small-size, light-weight and cheap-price, through using a semiconductor-leser in the information read-out, tracking or focussing, thereby simplifying its optical system.
COPYRIGHT: (C)1976,JPO&Japio
JP50071946A 1975-06-16 1975-06-16 optical information reproducing device Expired JPS5918772B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50071946A JPS5918772B2 (en) 1975-06-16 1975-06-16 optical information reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50071946A JPS5918772B2 (en) 1975-06-16 1975-06-16 optical information reproducing device

Publications (2)

Publication Number Publication Date
JPS51148441A true JPS51148441A (en) 1976-12-20
JPS5918772B2 JPS5918772B2 (en) 1984-04-28

Family

ID=13475155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50071946A Expired JPS5918772B2 (en) 1975-06-16 1975-06-16 optical information reproducing device

Country Status (1)

Country Link
JP (1) JPS5918772B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62188032A (en) * 1987-01-27 1987-08-17 Olympus Optical Co Ltd Optical information reader

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62188032A (en) * 1987-01-27 1987-08-17 Olympus Optical Co Ltd Optical information reader
JPH0546019B2 (en) * 1987-01-27 1993-07-12 Olympus Optical Co

Also Published As

Publication number Publication date
JPS5918772B2 (en) 1984-04-28

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