JPS5678823A - Automatic focus control device - Google Patents
Automatic focus control deviceInfo
- Publication number
- JPS5678823A JPS5678823A JP15665779A JP15665779A JPS5678823A JP S5678823 A JPS5678823 A JP S5678823A JP 15665779 A JP15665779 A JP 15665779A JP 15665779 A JP15665779 A JP 15665779A JP S5678823 A JPS5678823 A JP S5678823A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- wbn
- wan
- range finding
- prism
- 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
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE: To make it unnecessary to hold the lens during range finding to make it possible to shorten the time for focusing, by obtaining and correcting the finding error caused by lens movement.
CONSTITUTION: The light beam from the object is incident to photoelectric elements A1WAn through mirror 20, lens 21, and prism 22, and is incident to photoelectric elements B1WBn through mirror 23, lens 24, and prism 22. Photodiode arrays CCd, BBD, and so on are used in photoelectric element groups A1WAn and B4WBn. The defocus signal corresponding to phase slip j' of patterns A and B formed by outputs of photoelectric element groups A1WAn and B1WBn includes the error indicated by the two-dots chain line or the one-dot chain line in the figure when the lens is moved in a constant speed. Then, the true value is calculated from the range finding value of the defocus signal to control movement of the lens, so that range finding is possible while moving the lens, and the time required for focusing can be shortened.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15665779A JPS5678823A (en) | 1979-12-03 | 1979-12-03 | Automatic focus control device |
US06/201,528 US4387975A (en) | 1979-10-31 | 1980-10-28 | Automatic focusing position detection apparatus |
DE3050920A DE3050920C2 (en) | 1979-10-31 | 1980-10-31 | Device for the automatic focusing of an optical system on an object |
DE3041098A DE3041098C2 (en) | 1979-10-31 | 1980-10-31 | Device for determining the focus of an optical system on an object |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15665779A JPS5678823A (en) | 1979-12-03 | 1979-12-03 | Automatic focus control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5678823A true JPS5678823A (en) | 1981-06-29 |
JPH0410051B2 JPH0410051B2 (en) | 1992-02-24 |
Family
ID=15632440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15665779A Granted JPS5678823A (en) | 1979-10-31 | 1979-12-03 | Automatic focus control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5678823A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4492448A (en) * | 1981-10-02 | 1985-01-08 | Minolta Camera Kabushiki Kaisha | Automatic focusing device for use in a camera |
US4816856A (en) * | 1986-03-31 | 1989-03-28 | Minolta Camera Kabushiki Kaisha | Automatic focus control device |
US4882601A (en) * | 1986-05-16 | 1989-11-21 | Minolta Camera Kabushiki Kaisha | Camera with an automatic focusing device |
JPH01309012A (en) * | 1988-06-08 | 1989-12-13 | Sigma:Kk | Automatic focus adjusting device |
US4888609A (en) * | 1985-01-17 | 1989-12-19 | Minolta Camera Kabushiki Kaisha | Automatic focus adjusting apparatus |
US4910548A (en) * | 1986-05-16 | 1990-03-20 | Minolta Camera Kabushiki Kaisha | Camera with a multi-zone focus detecting device |
US4924250A (en) * | 1986-03-31 | 1990-05-08 | Minolta Camera Kabushiki Kaisha | Automatic focus control device |
US5168299A (en) * | 1986-05-16 | 1992-12-01 | Minolta Camera Co., Ltd. | Camera with a multi-zone focus detecting device |
US5192966A (en) * | 1986-03-31 | 1993-03-09 | Minolta Camera Kabushiki Kaisha | Automatic focus control device |
US5196881A (en) * | 1986-03-31 | 1993-03-23 | Minolta Camera Kabushiki Kaisha | Automatic focus control device |
US5218395A (en) * | 1986-05-16 | 1993-06-08 | Minolta Camera Kabushiki Kaisha | Camera with a multi-zone focus detecting device |
JP2006039317A (en) * | 2004-07-28 | 2006-02-09 | Hamamatsu Photonics Kk | Automatic focusing device and microscope using the same |
-
1979
- 1979-12-03 JP JP15665779A patent/JPS5678823A/en active Granted
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4492448A (en) * | 1981-10-02 | 1985-01-08 | Minolta Camera Kabushiki Kaisha | Automatic focusing device for use in a camera |
US5079582A (en) * | 1985-01-14 | 1992-01-07 | Minolta Camera Kabushiki Kaisha | Automatic focus adjusting apparatus |
US4888609A (en) * | 1985-01-17 | 1989-12-19 | Minolta Camera Kabushiki Kaisha | Automatic focus adjusting apparatus |
US5001509A (en) * | 1985-01-17 | 1991-03-19 | Minolta Camera Kabushiki Kaisha | Automatic focus adjusting apparatus |
US4816856A (en) * | 1986-03-31 | 1989-03-28 | Minolta Camera Kabushiki Kaisha | Automatic focus control device |
US5196881A (en) * | 1986-03-31 | 1993-03-23 | Minolta Camera Kabushiki Kaisha | Automatic focus control device |
US5192966A (en) * | 1986-03-31 | 1993-03-09 | Minolta Camera Kabushiki Kaisha | Automatic focus control device |
US4924250A (en) * | 1986-03-31 | 1990-05-08 | Minolta Camera Kabushiki Kaisha | Automatic focus control device |
US5168299A (en) * | 1986-05-16 | 1992-12-01 | Minolta Camera Co., Ltd. | Camera with a multi-zone focus detecting device |
US4910548A (en) * | 1986-05-16 | 1990-03-20 | Minolta Camera Kabushiki Kaisha | Camera with a multi-zone focus detecting device |
US4882601A (en) * | 1986-05-16 | 1989-11-21 | Minolta Camera Kabushiki Kaisha | Camera with an automatic focusing device |
US5218395A (en) * | 1986-05-16 | 1993-06-08 | Minolta Camera Kabushiki Kaisha | Camera with a multi-zone focus detecting device |
JPH01309012A (en) * | 1988-06-08 | 1989-12-13 | Sigma:Kk | Automatic focus adjusting device |
JP2006039317A (en) * | 2004-07-28 | 2006-02-09 | Hamamatsu Photonics Kk | Automatic focusing device and microscope using the same |
Also Published As
Publication number | Publication date |
---|---|
JPH0410051B2 (en) | 1992-02-24 |
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