JPS53131007A - Automatic focusing device - Google Patents

Automatic focusing device

Info

Publication number
JPS53131007A
JPS53131007A JP4516277A JP4516277A JPS53131007A JP S53131007 A JPS53131007 A JP S53131007A JP 4516277 A JP4516277 A JP 4516277A JP 4516277 A JP4516277 A JP 4516277A JP S53131007 A JPS53131007 A JP S53131007A
Authority
JP
Japan
Prior art keywords
automatic focusing
focusing device
objective lens
disc
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
JP4516277A
Other languages
Japanese (ja)
Inventor
Takashi Yamaguchi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4516277A priority Critical patent/JPS53131007A/en
Publication of JPS53131007A publication Critical patent/JPS53131007A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To prevent an objective lens from contacting with a video disc, even when the lens comes abnormally close to the disc, by providing a stopper in the objective lens moving mechanism of the video disc.
COPYRIGHT: (C)1978,JPO&Japio
JP4516277A 1977-04-21 1977-04-21 Automatic focusing device Pending JPS53131007A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4516277A JPS53131007A (en) 1977-04-21 1977-04-21 Automatic focusing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4516277A JPS53131007A (en) 1977-04-21 1977-04-21 Automatic focusing device

Publications (1)

Publication Number Publication Date
JPS53131007A true JPS53131007A (en) 1978-11-15

Family

ID=12711557

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4516277A Pending JPS53131007A (en) 1977-04-21 1977-04-21 Automatic focusing device

Country Status (1)

Country Link
JP (1) JPS53131007A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5625335U (en) * 1979-07-31 1981-03-07
JPS60251529A (en) * 1984-05-25 1985-12-12 Sony Corp Optical disk player

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5121783A (en) * 1974-08-19 1976-02-21 Hitachi Ltd Handotaiuehano peretsutokahoho

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5121783A (en) * 1974-08-19 1976-02-21 Hitachi Ltd Handotaiuehano peretsutokahoho

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5625335U (en) * 1979-07-31 1981-03-07
JPS60251529A (en) * 1984-05-25 1985-12-12 Sony Corp Optical disk player
JPH0473219B2 (en) * 1984-05-25 1992-11-20 Sony Corp

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