JPS6448051A - Automatic focusing device - Google Patents
Automatic focusing deviceInfo
- Publication number
- JPS6448051A JPS6448051A JP20461487A JP20461487A JPS6448051A JP S6448051 A JPS6448051 A JP S6448051A JP 20461487 A JP20461487 A JP 20461487A JP 20461487 A JP20461487 A JP 20461487A JP S6448051 A JPS6448051 A JP S6448051A
- Authority
- JP
- Japan
- Prior art keywords
- range
- center part
- finding
- mpu
- finding information
- 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
Abstract
PURPOSE:To prevent the focusing of the nearest peripheral object and to evade soft focusing in a center part by executing a process that the range-finding information in the center part where the possibility of the existence of a main object is high is made important. CONSTITUTION:According to a control signal from an MPU 6, a light emission control circuit 2 sequentially lights light projecting elements 1a-1c in a set timing. And the reflected light from the object is formed into a real image on the surface of a photodetector 3 and according to the output signal thereof, a range-finding circuit 4 sequentially calculates the distance to the object corresponding to respective range-finding points. The calculated range-finding information is read in the MPU 6 so as to compute the position of a focal point and a driving circuit 7 moves a photographic lens unit 8 to a specified position according to the computed result. In such a case, the MPU 6 compares the range-found results in the center part of an image plane and in the peripheral part of the image plane and decides the main object by executing the process that the range-finding information in the center part is made important.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20461487A JPS6448051A (en) | 1987-08-18 | 1987-08-18 | Automatic focusing device |
US08/072,860 US5313245A (en) | 1987-04-24 | 1993-06-07 | Automatic focusing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20461487A JPS6448051A (en) | 1987-08-18 | 1987-08-18 | Automatic focusing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6448051A true JPS6448051A (en) | 1989-02-22 |
Family
ID=16493391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20461487A Pending JPS6448051A (en) | 1987-04-24 | 1987-08-18 | Automatic focusing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6448051A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019028403A (en) * | 2017-08-03 | 2019-02-21 | キヤノン株式会社 | Focus adjustment device and method |
-
1987
- 1987-08-18 JP JP20461487A patent/JPS6448051A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019028403A (en) * | 2017-08-03 | 2019-02-21 | キヤノン株式会社 | Focus adjustment device and method |
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