JPS5319805A - Automatic focusing optical device - Google Patents

Automatic focusing optical device

Info

Publication number
JPS5319805A
JPS5319805A JP9399976A JP9399976A JPS5319805A JP S5319805 A JPS5319805 A JP S5319805A JP 9399976 A JP9399976 A JP 9399976A JP 9399976 A JP9399976 A JP 9399976A JP S5319805 A JPS5319805 A JP S5319805A
Authority
JP
Japan
Prior art keywords
optical device
automatic focusing
focusing optical
adaptation
control signal
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
JP9399976A
Other languages
Japanese (ja)
Other versions
JPS608534B2 (en
Inventor
Takeshi Maeda
Yoshito Tsunoda
Susumu Sawano
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 JP51093999A priority Critical patent/JPS608534B2/en
Publication of JPS5319805A publication Critical patent/JPS5319805A/en
Publication of JPS608534B2 publication Critical patent/JPS608534B2/en
Expired legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: Making the detection range of a focus deviation control signal to a value sufficient for adaptation to video discs is made possible by determining the set position of a cylindrical lens at a specified value.
COPYRIGHT: (C)1978,JPO&Japio
JP51093999A 1976-08-09 1976-08-09 automatic focusing optics Expired JPS608534B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP51093999A JPS608534B2 (en) 1976-08-09 1976-08-09 automatic focusing optics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP51093999A JPS608534B2 (en) 1976-08-09 1976-08-09 automatic focusing optics

Publications (2)

Publication Number Publication Date
JPS5319805A true JPS5319805A (en) 1978-02-23
JPS608534B2 JPS608534B2 (en) 1985-03-04

Family

ID=14098092

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51093999A Expired JPS608534B2 (en) 1976-08-09 1976-08-09 automatic focusing optics

Country Status (1)

Country Link
JP (1) JPS608534B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5459108A (en) * 1977-10-20 1979-05-12 Tdk Corp Magnetic recording medium
JPS55926A (en) * 1978-06-16 1980-01-07 Pioneer Video Corp Focus servo unit of optical information reader
JPS55927A (en) * 1978-06-16 1980-01-07 Pioneer Video Corp Focus servo unit of optical information reader
JPS5845632A (en) * 1981-06-30 1983-03-16 ストレ−ジ・テクノロジ−・コ−ポレ−シヨン Apparatus for reading information memorized into radiation beam reflection record star 02 like track pattern
JPS6334390A (en) * 1986-07-25 1988-02-15 日本ピラ−工業株式会社 Pipe joint

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5459108A (en) * 1977-10-20 1979-05-12 Tdk Corp Magnetic recording medium
JPS571047B2 (en) * 1977-10-20 1982-01-09
JPS55926A (en) * 1978-06-16 1980-01-07 Pioneer Video Corp Focus servo unit of optical information reader
JPS55927A (en) * 1978-06-16 1980-01-07 Pioneer Video Corp Focus servo unit of optical information reader
JPS6040094B2 (en) * 1978-06-16 1985-09-09 パイオニアビデオ株式会社 Focus servo device for optical information reading device
JPS6120055B2 (en) * 1978-06-16 1986-05-20 Paionia Bideo Kk
JPS5845632A (en) * 1981-06-30 1983-03-16 ストレ−ジ・テクノロジ−・コ−ポレ−シヨン Apparatus for reading information memorized into radiation beam reflection record star 02 like track pattern
JPS6334390A (en) * 1986-07-25 1988-02-15 日本ピラ−工業株式会社 Pipe joint

Also Published As

Publication number Publication date
JPS608534B2 (en) 1985-03-04

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