JPS54161928A - Focus detector - Google Patents
Focus detectorInfo
- Publication number
- JPS54161928A JPS54161928A JP7113978A JP7113978A JPS54161928A JP S54161928 A JPS54161928 A JP S54161928A JP 7113978 A JP7113978 A JP 7113978A JP 7113978 A JP7113978 A JP 7113978A JP S54161928 A JPS54161928 A JP S54161928A
- Authority
- JP
- Japan
- Prior art keywords
- array
- optical system
- scanning
- signals
- self
- 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 eliminate the need for equal speed movement of lenses and make possible manual feeding and temporary stopping by using a self-scanning type photo sensor array.
CONSTITUTION: This is provided with an A/D converter 9 which fetches the object image formed on a self-scanning type photo sensor array 6 by an optical system 5 as time series signals through scanning of the array 6 and converts the respective outputs of the array to digital signals, arithmetic circuits 10, 11 which operate the differential signals between the respective adjoining outputs of the time series digital signals from the array 6, a circuit 12 which detects the maximum value of the adjoining output difference at each scanning of the array 6, a maximal value detecting circuit 13 which obtains the position of an optical system 5 becoming maximal of the maximum value by subsequently comparing the maximum values of detection at the position moving of the optical system and a focus display circuit 14 which displays the focus of the image by the detection output.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7113978A JPS54161928A (en) | 1978-06-12 | 1978-06-12 | Focus detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7113978A JPS54161928A (en) | 1978-06-12 | 1978-06-12 | Focus detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54161928A true JPS54161928A (en) | 1979-12-22 |
Family
ID=13451945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7113978A Pending JPS54161928A (en) | 1978-06-12 | 1978-06-12 | Focus detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54161928A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5785013A (en) * | 1980-11-17 | 1982-05-27 | Kawasaki Heavy Ind Ltd | Automatic focusing method |
JPS5858505A (en) * | 1981-10-05 | 1983-04-07 | Hitachi Ltd | Auto-focus device for video camera |
JPS59140409A (en) * | 1983-07-06 | 1984-08-11 | Minolta Camera Co Ltd | Focus detecting device |
-
1978
- 1978-06-12 JP JP7113978A patent/JPS54161928A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5785013A (en) * | 1980-11-17 | 1982-05-27 | Kawasaki Heavy Ind Ltd | Automatic focusing method |
JPS5858505A (en) * | 1981-10-05 | 1983-04-07 | Hitachi Ltd | Auto-focus device for video camera |
JPH0115188B2 (en) * | 1981-10-05 | 1989-03-16 | Hitachi Ltd | |
JPS59140409A (en) * | 1983-07-06 | 1984-08-11 | Minolta Camera Co Ltd | Focus detecting device |
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