JPS55110228A - Focus detector of camera - Google Patents
Focus detector of cameraInfo
- Publication number
- JPS55110228A JPS55110228A JP1694879A JP1694879A JPS55110228A JP S55110228 A JPS55110228 A JP S55110228A JP 1694879 A JP1694879 A JP 1694879A JP 1694879 A JP1694879 A JP 1694879A JP S55110228 A JPS55110228 A JP S55110228A
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- enters
- contrast
- output
- 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
Links
Landscapes
- Automatic Focus Adjustment (AREA)
- Focusing (AREA)
Abstract
PURPOSE: To obtain the device which detect focus matching state by disposing two arrays of sensors on the two planes parallel to the film plane of the camera and comparing the contrast outputs obtainable therefrom.
CONSTITUTION: The luminous flux from the subject entering from a photographing lens 2 is bisected by a half mirror 6. The one goes upward and is observed by the eye 12 and the other is reflected downward by a mirror 7 and enters the inside of the optical constitution consisting of glass blocks 13, 14, 15. The entered luminous flux is bisected by a half mirror 16 and one thereof advances straightforward and enters a sensor 3. The other is reflected and enters a sensor 5. The sensors 3, 5 are so set that the film equivalent plane becomes the intermediate of these. Here, the output deducating the contrast output by the sensor 3 from the contrast output by the sensor 5 may be detected as rear defocus when it is (+), fornt defocus when (-) and focus matching when 0.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1694879A JPS55110228A (en) | 1979-02-16 | 1979-02-16 | Focus detector of camera |
US06/117,589 US4352545A (en) | 1979-02-13 | 1980-02-01 | Camera focus detecting device |
DE19803005044 DE3005044C2 (en) | 1979-02-13 | 1980-02-11 | Focus detection device for a camera |
FR8003066A FR2449293A1 (en) | 1979-02-13 | 1980-02-12 | DEVICE FOR DETECTING THE FOCUSING OF A CAMERA |
GB8004788A GB2047037B (en) | 1979-02-13 | 1980-02-13 | Focus detecting system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1694879A JPS55110228A (en) | 1979-02-16 | 1979-02-16 | Focus detector of camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55110228A true JPS55110228A (en) | 1980-08-25 |
Family
ID=11930344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1694879A Pending JPS55110228A (en) | 1979-02-13 | 1979-02-16 | Focus detector of camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55110228A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5897011A (en) * | 1981-12-07 | 1983-06-09 | Olympus Optical Co Ltd | Focusing detecting method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5245353A (en) * | 1975-10-08 | 1977-04-09 | Hitachi Ltd | Automatically focusing device |
JPS5315131A (en) * | 1976-07-27 | 1978-02-10 | Canon Inc | Detecting method for sharpness of objective image |
JPS5350851A (en) * | 1976-10-20 | 1978-05-09 | Hitachi Ltd | Automatic focus control apparatus of microscope |
JPS53141030A (en) * | 1977-05-14 | 1978-12-08 | Ricoh Co Ltd | Camera provided with focused point detector |
-
1979
- 1979-02-16 JP JP1694879A patent/JPS55110228A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5245353A (en) * | 1975-10-08 | 1977-04-09 | Hitachi Ltd | Automatically focusing device |
JPS5315131A (en) * | 1976-07-27 | 1978-02-10 | Canon Inc | Detecting method for sharpness of objective image |
JPS5350851A (en) * | 1976-10-20 | 1978-05-09 | Hitachi Ltd | Automatic focus control apparatus of microscope |
JPS53141030A (en) * | 1977-05-14 | 1978-12-08 | Ricoh Co Ltd | Camera provided with focused point detector |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5897011A (en) * | 1981-12-07 | 1983-06-09 | Olympus Optical Co Ltd | Focusing detecting method |
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