JPS6477009A - Distance detection device using focus detection device - Google Patents
Distance detection device using focus detection deviceInfo
- Publication number
- JPS6477009A JPS6477009A JP20669788A JP20669788A JPS6477009A JP S6477009 A JPS6477009 A JP S6477009A JP 20669788 A JP20669788 A JP 20669788A JP 20669788 A JP20669788 A JP 20669788A JP S6477009 A JPS6477009 A JP S6477009A
- Authority
- JP
- Japan
- Prior art keywords
- detection device
- distance
- focus
- photographic lens
- defocusing
- 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.)
- Granted
Links
Landscapes
- Automatic Focus Adjustment (AREA)
- Measurement Of Optical Distance (AREA)
- Focusing (AREA)
Abstract
PURPOSE:To detect an object distance even if a focus is not brought into an object by obtaining the extension quantity of a photographic lens from the position of infinity to the position of an object based on the extension quantity of the photographic lens from the position of infinity to the current position and the defocusing quantity to the object. CONSTITUTION:The extension quantity N of the photographic lens 11 from the position of infinity to the current position is detected and also the focusing state of the photographic lens 11 is detected so as to calculate the defocusing quantity DF to the object. And the distance (x) is calculated based on the extension quantity N and the defocusing quantity DF calculated in a defocusing quantity calculation means 2. Thus, the object distance (x) can be obtained even if the focus of the photographing lens 11 is not brought into the object.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63206697A JP2671421B2 (en) | 1988-08-20 | 1988-08-20 | Distance detection device using focus detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63206697A JP2671421B2 (en) | 1988-08-20 | 1988-08-20 | Distance detection device using focus detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6477009A true JPS6477009A (en) | 1989-03-23 |
JP2671421B2 JP2671421B2 (en) | 1997-10-29 |
Family
ID=16527618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63206697A Expired - Lifetime JP2671421B2 (en) | 1988-08-20 | 1988-08-20 | Distance detection device using focus detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2671421B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006113391A (en) * | 2004-10-15 | 2006-04-27 | Nikon Corp | Camera |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58150921A (en) * | 1982-03-04 | 1983-09-07 | Nippon Kogaku Kk <Nikon> | Information detector of automatic focusing camera |
-
1988
- 1988-08-20 JP JP63206697A patent/JP2671421B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58150921A (en) * | 1982-03-04 | 1983-09-07 | Nippon Kogaku Kk <Nikon> | Information detector of automatic focusing camera |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006113391A (en) * | 2004-10-15 | 2006-04-27 | Nikon Corp | Camera |
Also Published As
Publication number | Publication date |
---|---|
JP2671421B2 (en) | 1997-10-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |