GB2249896B - Automatic focusing apparatus and method for a video camera - Google Patents
Automatic focusing apparatus and method for a video cameraInfo
- 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
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)
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)
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)
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)
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 |
GB2141000B (en) * | 1983-04-28 | 1986-10-08 | Canon Kk | Automatic focus |
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 |
-
1990
- 1990-09-29 KR KR1019900015683A patent/KR950008704B1/ko not_active IP Right Cessation
- 1990-12-27 JP JP2407647A patent/JP2763828B2/ja not_active Expired - Fee Related
-
1991
- 1991-09-19 FR FR9111552A patent/FR2668326B1/fr not_active Expired - Fee Related
- 1991-09-24 DE DE4131808A patent/DE4131808C2/de not_active Expired - Fee Related
- 1991-09-27 GB GB9120686A patent/GB2249896B/en not_active Expired - Fee Related
Patent Citations (6)
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 |
---|---|
GB9120686D0 (en) | 1991-11-06 |
JPH04141634A (ja) | 1992-05-15 |
GB2249896A (en) | 1992-05-20 |
DE4131808A1 (de) | 1992-04-02 |
KR920007436A (ko) | 1992-04-28 |
KR950008704B1 (ko) | 1995-08-04 |
FR2668326B1 (fr) | 1994-02-04 |
JP2763828B2 (ja) | 1998-06-11 |
DE4131808C2 (de) | 1994-02-17 |
FR2668326A1 (fr) | 1992-04-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20090927 |