JPS51134642A - Photo head - Google Patents

Photo head

Info

Publication number
JPS51134642A
JPS51134642A JP50058603A JP5860375A JPS51134642A JP S51134642 A JPS51134642 A JP S51134642A JP 50058603 A JP50058603 A JP 50058603A JP 5860375 A JP5860375 A JP 5860375A JP S51134642 A JPS51134642 A JP S51134642A
Authority
JP
Japan
Prior art keywords
photo head
photo
head
emplayed
laser
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
JP50058603A
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 JP50058603A priority Critical patent/JPS51134642A/en
Publication of JPS51134642A publication Critical patent/JPS51134642A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

PURPOSE: Reflected light from a laser is emplayed fo provide automatic focussing and positioning with high accuracy.
COPYRIGHT: (C)1976,JPO&Japio
JP50058603A 1975-05-19 1975-05-19 Photo head Pending JPS51134642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50058603A JPS51134642A (en) 1975-05-19 1975-05-19 Photo head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50058603A JPS51134642A (en) 1975-05-19 1975-05-19 Photo head

Publications (1)

Publication Number Publication Date
JPS51134642A true JPS51134642A (en) 1976-11-22

Family

ID=13089080

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50058603A Pending JPS51134642A (en) 1975-05-19 1975-05-19 Photo head

Country Status (1)

Country Link
JP (1) JPS51134642A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53110111U (en) * 1977-02-09 1978-09-02
JPS61174021U (en) * 1986-03-20 1986-10-29

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53110111U (en) * 1977-02-09 1978-09-02
JPS61174021U (en) * 1986-03-20 1986-10-29

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