JPS54121121A - Focus detector - Google Patents
Focus detectorInfo
- Publication number
- JPS54121121A JPS54121121A JP2779178A JP2779178A JPS54121121A JP S54121121 A JPS54121121 A JP S54121121A JP 2779178 A JP2779178 A JP 2779178A JP 2779178 A JP2779178 A JP 2779178A JP S54121121 A JPS54121121 A JP S54121121A
- Authority
- JP
- Japan
- Prior art keywords
- detectors
- subject
- constitution
- concave
- behind
- 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
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE: To make the constitution of a focus detector simple by alternately applying the incident light from the same region of the subject to detectors which are provided in the positions optically equivalent to before and behind the intended focal plane.
CONSTITUTION: Concave and convex parts 10, 11 are formed in the focusing screen 5 in observation optical system and the installation positions of the light intensity detectors 8, 9 opposing to these concave and convex parts become optically equivalent to before and behind the intended focal plane. Hence, if the subject light from the same region of the subject is entered to the detectors 8, 9 through fine vibration or the like of a mirror 2, the focusing is detected when the detection outputs of the detectors 8, 9 become equal.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2779178A JPS54121121A (en) | 1978-03-13 | 1978-03-13 | Focus detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2779178A JPS54121121A (en) | 1978-03-13 | 1978-03-13 | Focus detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54121121A true JPS54121121A (en) | 1979-09-20 |
Family
ID=12230788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2779178A Pending JPS54121121A (en) | 1978-03-13 | 1978-03-13 | Focus detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54121121A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63303578A (en) * | 1987-06-04 | 1988-12-12 | Fuji Photo Film Co Ltd | Compact camera with focusing mechanism |
-
1978
- 1978-03-13 JP JP2779178A patent/JPS54121121A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63303578A (en) * | 1987-06-04 | 1988-12-12 | Fuji Photo Film Co Ltd | Compact camera with focusing mechanism |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS57108811A (en) | Optical focus position detector | |
JPS53110823A (en) | Optical information processor | |
JPS5576312A (en) | Focus detecting system of image | |
JPS57102609A (en) | Method and device for scanning using plural number of beams | |
JPS5295221A (en) | Detector for focusing | |
SE8201735L (en) | OPTICAL SCOCK SYSTEM | |
GB1512754A (en) | Radiant energy detection system | |
JPS55111929A (en) | Automatic focusing device | |
JPS55155331A (en) | Focus detector | |
JPS5432318A (en) | Lens for micro-reduction photography | |
SE8005564L (en) | Optical infrared light system | |
JPS54121121A (en) | Focus detector | |
JPS57150808A (en) | Focus detecting device | |
JPS53105223A (en) | Optical system of distance detector for automatic focusing | |
JPS5541432A (en) | Focus detector | |
JPS547323A (en) | Optical system for detecting point of focus | |
JPS55106421A (en) | Focusing detector | |
JPS5270851A (en) | Focal point adjusting system for rays | |
JPS5686357A (en) | Direction detector | |
JPS53107865A (en) | Detector of minute undulations | |
JPS5447668A (en) | Optical scanner | |
JPS5639518A (en) | Image detecting method | |
JPS5425852A (en) | Automatic focus detector | |
JPS57130006A (en) | Focus detector | |
JPS5425851A (en) | Focus detector |