JPS55106421A - Focusing detector - Google Patents
Focusing detectorInfo
- Publication number
- JPS55106421A JPS55106421A JP1400479A JP1400479A JPS55106421A JP S55106421 A JPS55106421 A JP S55106421A JP 1400479 A JP1400479 A JP 1400479A JP 1400479 A JP1400479 A JP 1400479A JP S55106421 A JPS55106421 A JP S55106421A
- Authority
- JP
- Japan
- Prior art keywords
- photoelectric element
- element arrays
- light
- photographing lens
- arrays
- 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 integrally dispose three photoelectric element arrays on the same plane and improve detection accuracy by trisecting the light from photographing lens by a prism or the like and letting the same enter three photoelectric element arrays respectively.
CONSTITUTION: The light from photographing lens is reflected by the mirrors 12, 13, 14 in a prism 21 to be trisected downward and is entered onto three photoelectric arrays 15, 16, 17 respectively. The output signals from the respective photoelectric element arrays are compared in an arithmetic circuit and focusing is detected. Since the photoelectric element arrays are integrated by the frame body, the light from the photographing lens is detected by the three photoelectric element arrays at the imaging plane and before and behind the imaging plane. In a focused state, the output of the photoelectric element placed on the imaging plane becomes largest. This constitution enables the proximate disposition of the respective photoelectric element arrays, makes positioning easy and permits the improvement in detection accuracy.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1400479A JPS55106421A (en) | 1979-02-09 | 1979-02-09 | Focusing detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1400479A JPS55106421A (en) | 1979-02-09 | 1979-02-09 | Focusing detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55106421A true JPS55106421A (en) | 1980-08-15 |
Family
ID=11849061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1400479A Pending JPS55106421A (en) | 1979-02-09 | 1979-02-09 | Focusing detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55106421A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55108629A (en) * | 1979-02-13 | 1980-08-21 | Asahi Optical Co Ltd | Focus detector of camera |
JPS55108630A (en) * | 1979-02-13 | 1980-08-21 | Asahi Optical Co Ltd | Focus detector of camera |
JPS5897009A (en) * | 1981-12-04 | 1983-06-09 | Olympus Optical Co Ltd | Automatic focus adjusting method |
JPS58209722A (en) * | 1982-05-31 | 1983-12-06 | Olympus Optical Co Ltd | Detecting and setting device of focusing |
US4496832A (en) * | 1980-10-16 | 1985-01-29 | Canon Kabushiki Kaisha | Focusing state discriminating system |
-
1979
- 1979-02-09 JP JP1400479A patent/JPS55106421A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55108629A (en) * | 1979-02-13 | 1980-08-21 | Asahi Optical Co Ltd | Focus detector of camera |
JPS55108630A (en) * | 1979-02-13 | 1980-08-21 | Asahi Optical Co Ltd | Focus detector of camera |
US4496832A (en) * | 1980-10-16 | 1985-01-29 | Canon Kabushiki Kaisha | Focusing state discriminating system |
JPS5897009A (en) * | 1981-12-04 | 1983-06-09 | Olympus Optical Co Ltd | Automatic focus adjusting method |
JPS58209722A (en) * | 1982-05-31 | 1983-12-06 | Olympus Optical Co Ltd | Detecting and setting device of focusing |
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