DE3888297T2 - Automatische Fokussierungsschaltung. - Google Patents

Automatische Fokussierungsschaltung.

Info

Publication number
DE3888297T2
DE3888297T2 DE3888297T DE3888297T DE3888297T2 DE 3888297 T2 DE3888297 T2 DE 3888297T2 DE 3888297 T DE3888297 T DE 3888297T DE 3888297 T DE3888297 T DE 3888297T DE 3888297 T2 DE3888297 T2 DE 3888297T2
Authority
DE
Germany
Prior art keywords
automatic focus
focus switching
switching
automatic
focus
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.)
Expired - Fee Related
Application number
DE3888297T
Other languages
English (en)
Other versions
DE3888297D1 (de
Inventor
Ryuichiro Kuga
Masayuki Yoneyama
Teruyoshi Miura
Yoshiaki Hirao
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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
Priority claimed from JP62296534A external-priority patent/JPH0785574B2/ja
Priority claimed from JP63148556A external-priority patent/JPH022791A/ja
Priority claimed from JP63158523A external-priority patent/JPH027777A/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of DE3888297D1 publication Critical patent/DE3888297D1/de
Publication of DE3888297T2 publication Critical patent/DE3888297T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G02B7/365—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals by analysis of the spatial frequency components of the image
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/67—Focus control based on electronic image sensor signals
    • H04N23/673—Focus control based on electronic image sensor signals based on contrast or high frequency components of image signals, e.g. hill climbing method

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Automatic Focus Adjustment (AREA)
DE3888297T 1987-11-25 1988-11-24 Automatische Fokussierungsschaltung. Expired - Fee Related DE3888297T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP62296534A JPH0785574B2 (ja) 1987-11-25 1987-11-25 自動焦点調節装置
JP63148556A JPH022791A (ja) 1988-06-16 1988-06-16 自動焦点調節装置
JP63158523A JPH027777A (ja) 1988-06-27 1988-06-27 自動焦点調節装置

Publications (2)

Publication Number Publication Date
DE3888297D1 DE3888297D1 (de) 1994-04-14
DE3888297T2 true DE3888297T2 (de) 1994-08-04

Family

ID=27319576

Family Applications (2)

Application Number Title Priority Date Filing Date
DE3888297T Expired - Fee Related DE3888297T2 (de) 1987-11-25 1988-11-24 Automatische Fokussierungsschaltung.
DE3856250T Expired - Lifetime DE3856250T2 (de) 1987-11-25 1988-11-24 Automatische Fokussierungsschaltung

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE3856250T Expired - Lifetime DE3856250T2 (de) 1987-11-25 1988-11-24 Automatische Fokussierungsschaltung

Country Status (4)

Country Link
US (1) US4975726A (de)
EP (2) EP0548061B1 (de)
KR (1) KR910007514B1 (de)
DE (2) DE3888297T2 (de)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5070408A (en) * 1989-05-19 1991-12-03 Sony Corporation Focusing apparatus and digital filters for use therewith
JPH03143173A (ja) * 1989-10-30 1991-06-18 Toshiba Corp ビデオ・カメラの自動焦点調節装置
DE3938522C2 (de) * 1989-11-21 1998-09-24 Philips Broadcast Television S System zum Fokussieren eines Fernsehkamera-Objektivs
JPH03214868A (ja) * 1990-01-19 1991-09-20 Ricoh Co Ltd 自動焦点調整装置
US6130716A (en) * 1991-08-09 2000-10-10 Canon Kabushiki Kaisha Autofocusing camera device
JPH05292382A (ja) * 1992-04-15 1993-11-05 Sony Corp オートフォーカス装置
JP3298146B2 (ja) * 1992-05-29 2002-07-02 ソニー株式会社 オートフォーカス装置
JPH06205269A (ja) * 1993-01-06 1994-07-22 Matsushita Electric Ind Co Ltd 自動焦点調節装置およびビデオカメラ
DE4413368C1 (de) * 1994-04-19 1995-09-28 Wilfried Donner Verfahren und Vorrichtung zur optischen Scharfeinstellung
JPH089228A (ja) 1994-06-17 1996-01-12 Matsushita Electric Ind Co Ltd ビデオカメラ
US5666569A (en) * 1994-08-25 1997-09-09 Flashpoint Technology, Inc. System and method for detecting and indicating proper focal distance in a fixed lens camera
US6373524B2 (en) * 1995-06-22 2002-04-16 Canon Kabushiki Kaisha Interchangeable lens video camera system
US5874994A (en) * 1995-06-30 1999-02-23 Eastman Kodak Company Filter employing arithmetic operations for an electronic sychronized digital camera
WO2000007496A1 (en) * 1998-08-06 2000-02-17 The Johns Hopkins University Video opto-diagnostic instrument with single-adjustment focus
JP2000147370A (ja) * 1998-11-18 2000-05-26 Sony Corp 撮像装置
JP4408001B2 (ja) * 2000-12-21 2010-02-03 キヤノン株式会社 撮像装置および撮像システム
JP3964315B2 (ja) * 2002-12-03 2007-08-22 株式会社リコー デジタルカメラ
JP5173131B2 (ja) * 2005-10-26 2013-03-27 キヤノン株式会社 光学機器および焦点調節方法
JP5898481B2 (ja) * 2011-12-13 2016-04-06 キヤノン株式会社 撮像装置及び焦点検出方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6097784A (ja) * 1983-11-01 1985-05-31 Sanyo Electric Co Ltd オ−トフオ−カス制御回路
JPS60217759A (ja) * 1984-04-13 1985-10-31 Matsushita Electric Ind Co Ltd 自動焦点整合装置
JPS61105978A (ja) * 1984-10-30 1986-05-24 Sanyo Electric Co Ltd オ−トフオ−カス回路
FR2575888B1 (fr) * 1985-01-04 1987-02-20 Thomson Csf Procede et dispositif de mise au point d'une camera et camera comportant un tel dispositif
JPS6347711A (ja) * 1986-08-18 1988-02-29 Minolta Camera Co Ltd 焦点検出装置
JPS63178674A (ja) * 1987-01-19 1988-07-22 Sanyo Electric Co Ltd オ−トフオ−カス回路

Also Published As

Publication number Publication date
KR910007514B1 (ko) 1991-09-26
DE3856250T2 (de) 1999-02-04
EP0318278A3 (en) 1990-03-07
DE3856250D1 (de) 1998-10-15
EP0548061A3 (en) 1994-05-18
KR890009180A (ko) 1989-07-15
EP0318278B1 (de) 1994-03-09
EP0548061A2 (de) 1993-06-23
DE3888297D1 (de) 1994-04-14
US4975726A (en) 1990-12-04
EP0318278A2 (de) 1989-05-31
EP0548061B1 (de) 1998-09-09

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee