FR2448732B1 - - Google Patents
Info
- Publication number
- FR2448732B1 FR2448732B1 FR8002789A FR8002789A FR2448732B1 FR 2448732 B1 FR2448732 B1 FR 2448732B1 FR 8002789 A FR8002789 A FR 8002789A FR 8002789 A FR8002789 A FR 8002789A FR 2448732 B1 FR2448732 B1 FR 2448732B1
- Authority
- FR
- France
- 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
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)
- Automatic Focus Adjustment (AREA)
- Focusing (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1404279A JPS55108627A (en) | 1979-02-09 | 1979-02-09 | Focus detector of camera |
JP1525479A JPS55108628A (en) | 1979-02-13 | 1979-02-13 | Focus detector of camera |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2448732A1 FR2448732A1 (en) | 1980-09-05 |
FR2448732B1 true FR2448732B1 (en) | 1984-03-30 |
Family
ID=26349933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8002789A Granted FR2448732A1 (en) | 1979-02-09 | 1980-02-08 | FOCUSING DETECTION DEVICE FOR A CAMERA |
Country Status (3)
Country | Link |
---|---|
DE (2) | DE3050691C2 (en) |
FR (1) | FR2448732A1 (en) |
GB (1) | GB2047036B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3049233C2 (en) * | 1979-12-27 | 1988-01-21 | Asahi Kogaku Kogyo K.K., Tokyo | Photographic camera with automatic focus |
DE3131053C2 (en) * | 1980-08-07 | 1983-12-29 | Asahi Kogaku Kogyo K.K., Tokyo | Automatic focusing detection device for a camera |
US4384210A (en) * | 1981-02-06 | 1983-05-17 | Honeywell Inc. | Spatial low pass filter for range finding systems |
JPS5882211A (en) * | 1981-11-12 | 1983-05-17 | Asahi Optical Co Ltd | Auto-focusing device |
US4804831A (en) * | 1985-10-30 | 1989-02-14 | Canon Kabushiki Kaisha | Focus detecting apparatus independent of object image contrast |
DE3844874C2 (en) * | 1987-09-02 | 1995-03-09 | Canon Kk | Automatic focusing device |
GB2209446B (en) * | 1987-09-02 | 1992-09-30 | Canon Kk | Automatic focusing device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1173327B (en) * | 1961-04-10 | 1964-07-02 | Logetronics Inc | Arrangement for detecting and automatically adjusting the focus in a photographic device |
US3967056A (en) * | 1973-02-26 | 1976-06-29 | Minolta Camera Kabushiki Kaisha | Automatic focusing apparatus |
DE2406045C2 (en) * | 1974-02-08 | 1983-03-17 | Canon Inc., Tokyo | Arrangement consisting of at least two photoelectric conversion elements |
JPS5315131A (en) * | 1976-07-27 | 1978-02-10 | Canon Inc | Detecting method for sharpness of objective image |
DE2821722C2 (en) * | 1978-05-18 | 1981-09-17 | Siemens AG, 1000 Berlin und 8000 München | Device for automatic or semi-automatic focusing of the image of an object on an image plane |
-
1980
- 1980-02-05 DE DE19803050691 patent/DE3050691C2/en not_active Expired
- 1980-02-05 DE DE19803004147 patent/DE3004147C2/en not_active Expired
- 1980-02-08 GB GB8004233A patent/GB2047036B/en not_active Expired
- 1980-02-08 FR FR8002789A patent/FR2448732A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
DE3050691C2 (en) | 1984-09-27 |
GB2047036B (en) | 1983-02-16 |
DE3004147A1 (en) | 1980-08-14 |
GB2047036A (en) | 1980-11-19 |
DE3004147C2 (en) | 1983-06-23 |
FR2448732A1 (en) | 1980-09-05 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
DL | Decision of the director general to leave to make available licences of right | ||
ST | Notification of lapse |