JPS6482773A - Automatic focusing device - Google Patents
Automatic focusing deviceInfo
- Publication number
- JPS6482773A JPS6482773A JP62238703A JP23870387A JPS6482773A JP S6482773 A JPS6482773 A JP S6482773A JP 62238703 A JP62238703 A JP 62238703A JP 23870387 A JP23870387 A JP 23870387A JP S6482773 A JPS6482773 A JP S6482773A
- Authority
- JP
- Japan
- Prior art keywords
- infrared
- illuminance
- light
- low
- cut filter
- 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)
Abstract
PURPOSE:To put an object in focus with low illuminance by removing an infrared-light cut filter and performing focusing operation with infrared light in a low-illuminance atmosphere. CONSTITUTION:A brightness detecting circuit 72 detects whether or not a video signal is generated sufficiently at a terminal 301 and when low illuminance is judged, the infrared-light cut filter 12 installed in front of an image pickup element 2 is removed by an infrared-light cut filter driving device 43 and an infrared-light irradiating means 6 emits infrared light to the subject. Then a video AF circuit 5 detects a focusing point with the video signal outputted to the terminal 301 and the lens 1 is driven by a lens driving circuit 42 and a lens driving mechanism 41 and moved to the position where the contour of a subject image on the image pickup element 2 becomes sharpest. Consequently, even the object in the low-illuminance atmosphere is put in focus with high accuracy.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62238703A JPS6482773A (en) | 1987-09-25 | 1987-09-25 | Automatic focusing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62238703A JPS6482773A (en) | 1987-09-25 | 1987-09-25 | Automatic focusing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6482773A true JPS6482773A (en) | 1989-03-28 |
Family
ID=17034033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62238703A Pending JPS6482773A (en) | 1987-09-25 | 1987-09-25 | Automatic focusing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6482773A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006084558A (en) * | 2004-09-14 | 2006-03-30 | Fujinon Corp | Automatic focusing system |
JP2006308766A (en) * | 2005-04-27 | 2006-11-09 | Nikon Corp | Focus-detecting system and photographic device |
JP2010049001A (en) * | 2008-08-21 | 2010-03-04 | Canon Inc | Image capturing apparatus |
JP2014178591A (en) * | 2013-03-15 | 2014-09-25 | Canon Inc | Imaging apparatus and control method thereof |
-
1987
- 1987-09-25 JP JP62238703A patent/JPS6482773A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006084558A (en) * | 2004-09-14 | 2006-03-30 | Fujinon Corp | Automatic focusing system |
JP2006308766A (en) * | 2005-04-27 | 2006-11-09 | Nikon Corp | Focus-detecting system and photographic device |
JP2010049001A (en) * | 2008-08-21 | 2010-03-04 | Canon Inc | Image capturing apparatus |
JP2014178591A (en) * | 2013-03-15 | 2014-09-25 | Canon Inc | Imaging apparatus and control method thereof |
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