JPS56140330A - Automatic focus adjusting mechanism - Google Patents

Automatic focus adjusting mechanism

Info

Publication number
JPS56140330A
JPS56140330A JP4334480A JP4334480A JPS56140330A JP S56140330 A JPS56140330 A JP S56140330A JP 4334480 A JP4334480 A JP 4334480A JP 4334480 A JP4334480 A JP 4334480A JP S56140330 A JPS56140330 A JP S56140330A
Authority
JP
Japan
Prior art keywords
output
lens
revolution
focus
video camera
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
JP4334480A
Other languages
Japanese (ja)
Inventor
Akira Maeda
Osamu Kaite
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP4334480A priority Critical patent/JPS56140330A/en
Publication of JPS56140330A publication Critical patent/JPS56140330A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To adjust the focus of a video camera continuously and automatically with high accuracy by displaying a lens based on the period until the transmitted output comes back by reflecting on an object. CONSTITUTION:The period since ultrasonic waves are emitted from a transmission circuit 1 at predetermined periods until they are reflected by an object and are received in a receiving circuit 2 is counted by a distance counter 7. The output of a position counter 13 which reversibly counts the lens position by detecting the revolution of a lens moving motor M and the output of the distance counter 7 or the associated outputs of both outputs are compared in a comparator 20, and the compared output thereof is inputted to a control circuit 21, by which the revolution of the lens moving motor M is controlled and the focus of the video camera is automatically adjusted always with high accuracy.
JP4334480A 1980-04-01 1980-04-01 Automatic focus adjusting mechanism Pending JPS56140330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4334480A JPS56140330A (en) 1980-04-01 1980-04-01 Automatic focus adjusting mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4334480A JPS56140330A (en) 1980-04-01 1980-04-01 Automatic focus adjusting mechanism

Publications (1)

Publication Number Publication Date
JPS56140330A true JPS56140330A (en) 1981-11-02

Family

ID=12661219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4334480A Pending JPS56140330A (en) 1980-04-01 1980-04-01 Automatic focus adjusting mechanism

Country Status (1)

Country Link
JP (1) JPS56140330A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0554256U (en) * 1991-12-27 1993-07-20 日立粉末冶金株式会社 Transport case

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0554256U (en) * 1991-12-27 1993-07-20 日立粉末冶金株式会社 Transport case

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