JPS6459311A - Automatic focusing camera - Google Patents
Automatic focusing cameraInfo
- Publication number
- JPS6459311A JPS6459311A JP21773387A JP21773387A JPS6459311A JP S6459311 A JPS6459311 A JP S6459311A JP 21773387 A JP21773387 A JP 21773387A JP 21773387 A JP21773387 A JP 21773387A JP S6459311 A JPS6459311 A JP S6459311A
- Authority
- JP
- Japan
- Prior art keywords
- driving
- deviation
- photographic lens
- selection means
- outputted
- 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
- Lens Barrels (AREA)
- Automatic Focus Adjustment (AREA)
- Focusing (AREA)
Abstract
PURPOSE:To perform the measurement of distance and the driving of a lens at the same time and to reduce a time for focusing by providing a selection means for selecting the quantity of driving the photographic lens corresponding to a defocusing quantity. CONSTITUTION:A detection means 2 detects the quantity of deviation between a position on the optical axis of the image surface where the image of an object is formed through the photographic lens 1 and a position on the optical axis of a film surface. The quantity of driving the photographic lens corresponding to the quantity of deviation is stored in a storage means 3 in a table form and the selection means 4 selects the quantity of driving the photographic lens corresponding to the quantity of deviation outputted from the detection means 2. In such a case, the matrix in which the driving quantity is made to correspond to the quantity of deviation is used in order to obtain the driving quantity corresponding to the quantity of deviation. Based on the quantity of driving the photographic lens outputted from the selection means 4 a driving control means 5 controls the driving and a driving means 6 drives a focusing lens group. Thus, the proper moving quantity of a focus group can be calculated and the time until completing AF can be shortened without repeating AF actions several times.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21773387A JPS6459311A (en) | 1987-08-31 | 1987-08-31 | Automatic focusing camera |
US07/236,634 US4931820A (en) | 1987-08-25 | 1988-08-25 | Auto-focus camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21773387A JPS6459311A (en) | 1987-08-31 | 1987-08-31 | Automatic focusing camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6459311A true JPS6459311A (en) | 1989-03-07 |
Family
ID=16708894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21773387A Pending JPS6459311A (en) | 1987-08-25 | 1987-08-31 | Automatic focusing camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6459311A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0248618A (en) * | 1988-08-10 | 1990-02-19 | Seikosha Co Ltd | Automatic focusing camera |
US6700614B1 (en) | 1998-10-08 | 2004-03-02 | Ricoh Company, Ltd. | Autofocus apparatus |
US6825883B1 (en) | 1998-08-04 | 2004-11-30 | Ricoh Company, Ltd. | Auto-focus apparatus based on pixel resolution and control method for the same |
-
1987
- 1987-08-31 JP JP21773387A patent/JPS6459311A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0248618A (en) * | 1988-08-10 | 1990-02-19 | Seikosha Co Ltd | Automatic focusing camera |
US6825883B1 (en) | 1998-08-04 | 2004-11-30 | Ricoh Company, Ltd. | Auto-focus apparatus based on pixel resolution and control method for the same |
US6700614B1 (en) | 1998-10-08 | 2004-03-02 | Ricoh Company, Ltd. | Autofocus apparatus |
US7295243B2 (en) | 1998-10-08 | 2007-11-13 | Ricoh Company, Ltd. | Autofocus apparatus having a flash synchronized to an autofocus sampling time |
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