JPS52142501A - Focal point detection for video disc apparatus - Google Patents

Focal point detection for video disc apparatus

Info

Publication number
JPS52142501A
JPS52142501A JP5899276A JP5899276A JPS52142501A JP S52142501 A JPS52142501 A JP S52142501A JP 5899276 A JP5899276 A JP 5899276A JP 5899276 A JP5899276 A JP 5899276A JP S52142501 A JPS52142501 A JP S52142501A
Authority
JP
Japan
Prior art keywords
disc apparatus
video disc
focal point
point detection
rotations
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
JP5899276A
Other languages
Japanese (ja)
Inventor
Toru Musha
Takeomi Suzuki
Kenji Fukuoka
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP5899276A priority Critical patent/JPS52142501A/en
Publication of JPS52142501A publication Critical patent/JPS52142501A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To provide a simplified video disc apparatus by comparing the detecting signal due to an information groove, which has its optical path length varied with a preset period in the direction of rotations of a disc, with the reference signal of the same period.
COPYRIGHT: (C)1977,JPO&Japio
JP5899276A 1976-05-24 1976-05-24 Focal point detection for video disc apparatus Pending JPS52142501A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5899276A JPS52142501A (en) 1976-05-24 1976-05-24 Focal point detection for video disc apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5899276A JPS52142501A (en) 1976-05-24 1976-05-24 Focal point detection for video disc apparatus

Publications (1)

Publication Number Publication Date
JPS52142501A true JPS52142501A (en) 1977-11-28

Family

ID=13100330

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5899276A Pending JPS52142501A (en) 1976-05-24 1976-05-24 Focal point detection for video disc apparatus

Country Status (1)

Country Link
JP (1) JPS52142501A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5439710A (en) * 1991-10-17 1995-08-08 Herberts G.M.B.H. Method of producing multilayer coatings, more particularly for lacquering of motor vehicles, having good adhesion between layers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5439710A (en) * 1991-10-17 1995-08-08 Herberts G.M.B.H. Method of producing multilayer coatings, more particularly for lacquering of motor vehicles, having good adhesion between layers

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