GB2249896B - Automatic focusing apparatus and method for a video camera - Google Patents

Automatic focusing apparatus and method for a video camera

Info

Publication number
GB2249896B
GB2249896B GB9120686A GB9120686A GB2249896B GB 2249896 B GB2249896 B GB 2249896B GB 9120686 A GB9120686 A GB 9120686A GB 9120686 A GB9120686 A GB 9120686A GB 2249896 B GB2249896 B GB 2249896B
Authority
GB
United Kingdom
Prior art keywords
video camera
automatic focusing
focusing apparatus
automatic
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.)
Expired - Fee Related
Application number
GB9120686A
Other languages
English (en)
Other versions
GB2249896A (en
GB9120686D0 (en
Inventor
Chun-Gi Min
Su-Yeol Jeong
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics 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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of GB9120686D0 publication Critical patent/GB9120686D0/en
Publication of GB2249896A publication Critical patent/GB2249896A/en
Application granted granted Critical
Publication of GB2249896B publication Critical patent/GB2249896B/en
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
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
    • G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • G03B13/36—Autofocus systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/08—Duration or width modulation ; Duty cycle modulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10—Details of semiconductor or other solid state devices to be connected
    • H01L2924/11—Device type
    • H01L2924/12—Passive devices, e.g. 2 terminal devices
    • H01L2924/1204—Optical Diode
    • H01L2924/12041—LED

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Measurement Of Optical Distance (AREA)
  • Studio Devices (AREA)
GB9120686A 1990-09-29 1991-09-27 Automatic focusing apparatus and method for a video camera Expired - Fee Related GB2249896B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900015683A KR950008704B1 (ko) 1990-09-29 1990-09-29 비디오카메라의 자동촛점장치 및 그 방법

Publications (3)

Publication Number Publication Date
GB9120686D0 GB9120686D0 (en) 1991-11-06
GB2249896A GB2249896A (en) 1992-05-20
GB2249896B true GB2249896B (en) 1994-11-30

Family

ID=19304264

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9120686A Expired - Fee Related GB2249896B (en) 1990-09-29 1991-09-27 Automatic focusing apparatus and method for a video camera

Country Status (5)

Country Link
JP (1) JP2763828B2 (fr)
KR (1) KR950008704B1 (fr)
DE (1) DE4131808C2 (fr)
FR (1) FR2668326B1 (fr)
GB (1) GB2249896B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5572012A (en) * 1993-06-16 1996-11-05 Seiko Precision Inc. Distance measuring device for camera using integration of reflected light

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2013063A (en) * 1978-01-23 1979-08-01 Agfa Gevaert Ag Focussing system for a photographic or cinematographic camera
US4753528A (en) * 1983-12-13 1988-06-28 Quantime, Inc. Laser archery distance device
US4900911A (en) * 1986-03-12 1990-02-13 Minolta Camera Kabushiki Kaisha Focus detecting system utilizing correction data on aberrations of the photographic lens
US4909624A (en) * 1988-02-08 1990-03-20 Nikon Corporation Active distance measuring apparatus
US4974007A (en) * 1988-05-20 1990-11-27 Canon Kabushiki Kaisha Photographing device having plural range finding elements and plural photometric elements
US4983033A (en) * 1983-09-14 1991-01-08 Asahi Kogaku Kogyo Kabushiki Kaisha Automatic range finder for camera

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678835A (en) * 1969-08-20 1972-07-25 Canon Kk Automatic focusing device for cameras and the like
GB2104334B (en) * 1981-08-17 1986-06-18 Nat Res Corp Automatic focusing device
DE3416072C2 (de) * 1983-04-28 1993-12-16 Canon Kk Automatische Scharfeinstellungsdetektoreinrichtung
JPS60102606A (ja) * 1983-11-09 1985-06-06 Sanyo Electric Co Ltd オ−トフオ−カス制御回路
JPS60253811A (ja) * 1984-05-30 1985-12-14 Copal Co Ltd 測距装置
JPS6256911A (ja) * 1985-09-05 1987-03-12 Canon Inc 自動焦点検出装置
JP2811655B2 (ja) * 1985-10-09 1998-10-15 オリンパス光学工業株式会社 カメラのモータ駆動回路
JPS6360416A (ja) * 1986-09-01 1988-03-16 Konica Corp 自動焦点調節装置
JPS646932A (en) * 1987-06-29 1989-01-11 Minolta Camera Kk Payoff mechanism for lens
JPH01116510A (ja) * 1987-10-29 1989-05-09 Olympus Optical Co Ltd 光投射式オートフォーカス装置
JPH01140116U (fr) * 1988-03-19 1989-09-26

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2013063A (en) * 1978-01-23 1979-08-01 Agfa Gevaert Ag Focussing system for a photographic or cinematographic camera
US4983033A (en) * 1983-09-14 1991-01-08 Asahi Kogaku Kogyo Kabushiki Kaisha Automatic range finder for camera
US4753528A (en) * 1983-12-13 1988-06-28 Quantime, Inc. Laser archery distance device
US4900911A (en) * 1986-03-12 1990-02-13 Minolta Camera Kabushiki Kaisha Focus detecting system utilizing correction data on aberrations of the photographic lens
US4909624A (en) * 1988-02-08 1990-03-20 Nikon Corporation Active distance measuring apparatus
US4974007A (en) * 1988-05-20 1990-11-27 Canon Kabushiki Kaisha Photographing device having plural range finding elements and plural photometric elements

Also Published As

Publication number Publication date
GB2249896A (en) 1992-05-20
GB9120686D0 (en) 1991-11-06
FR2668326A1 (fr) 1992-04-24
KR920007436A (ko) 1992-04-28
DE4131808A1 (de) 1992-04-02
JP2763828B2 (ja) 1998-06-11
JPH04141634A (ja) 1992-05-15
FR2668326B1 (fr) 1994-02-04
KR950008704B1 (ko) 1995-08-04
DE4131808C2 (de) 1994-02-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20090927