JPS5675608A - Automatic focus control device and automatic focus detecting device - Google Patents
Automatic focus control device and automatic focus detecting deviceInfo
- Publication number
- JPS5675608A JPS5675608A JP15273279A JP15273279A JPS5675608A JP S5675608 A JPS5675608 A JP S5675608A JP 15273279 A JP15273279 A JP 15273279A JP 15273279 A JP15273279 A JP 15273279A JP S5675608 A JPS5675608 A JP S5675608A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- value
- memories
- defocusing
- output
- 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 focusing not be affected by the change-over of the F value mode by calculating the quantity of defocusing from the output signal of 2 pairs of photoelectric element groups detected by dividing a subject image, correcting the defocusing signal according to the change- over of the F value mode and making the relation between the quantity of defocusing and the leading-out distance of a photographic lens constant.
CONSTITUTION: In order to find phase difference j' of a subject image from outputs a1Wan and b1Wbn of CCD25 consisting of 2 pairs of photoelectric element groups A1WAn and B1WBn, ai and aj are stored in memories 33 and 32 and signals shifted by j, bi-j and bi+1-j, are stored in memories 36 and 35 respectively through AD converter 39, memories 30 and 31 and shifting circuit 34. Peak value Y1 of integration value of (ai-bij)q can be obtained from the output of memories 33 and 36 through differential circuit 37 and cumulative circuit 39. The output of zero-cross detecting circuit 47 for the similar operational output of the integration value of the difference between (ai-bi+1-j)p and (ai+1-bi-j)p and phse difference j' from Y1 are sent from operational circuit 48 to control circuit 26, the variation of j' caused by F value switching is denied through F value mode circuit 50 and a fixed defocusing signal is outputted from circuit 26.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15273279A JPS5675608A (en) | 1979-11-26 | 1979-11-26 | Automatic focus control device and automatic focus detecting 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 |
---|---|---|---|
JP15273279A JPS5675608A (en) | 1979-11-26 | 1979-11-26 | Automatic focus control device and automatic focus detecting device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5675608A true JPS5675608A (en) | 1981-06-22 |
JPH022130B2 JPH022130B2 (en) | 1990-01-17 |
Family
ID=15546943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15273279A Granted JPS5675608A (en) | 1979-10-31 | 1979-11-26 | Automatic focus control device and automatic focus detecting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5675608A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS591012U (en) * | 1982-06-25 | 1984-01-06 | 日本精密工業株式会社 | automatic focus adjustment device |
JPS59116604A (en) * | 1982-11-22 | 1984-07-05 | Olympus Optical Co Ltd | Focus detection |
JPS59140426A (en) * | 1983-02-01 | 1984-08-11 | Kyocera Corp | Motor control device of lens interchangeable automatic focusing camera |
JPS59159115A (en) * | 1983-03-01 | 1984-09-08 | Nippon Kogaku Kk <Nikon> | Automatic focusing device |
JPS6037513A (en) * | 1983-08-11 | 1985-02-26 | Nippon Kogaku Kk <Nikon> | Shift amount detector |
JPS6036906A (en) * | 1983-08-09 | 1985-02-26 | Konishiroku Photo Ind Co Ltd | Photoelectric type distance measuring apparatus |
JPS6225716A (en) * | 1985-07-26 | 1987-02-03 | Minolta Camera Co Ltd | Deviation detecting device for correlation image |
US4882601A (en) * | 1986-05-16 | 1989-11-21 | Minolta Camera Kabushiki Kaisha | Camera with an automatic focusing 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 |
JPH0333707A (en) * | 1990-07-03 | 1991-02-14 | Minolta Camera Co Ltd | Focus detector |
US5168299A (en) * | 1986-05-16 | 1992-12-01 | Minolta Camera Co., Ltd. | Camera with a multi-zone focus detecting device |
US5218395A (en) * | 1986-05-16 | 1993-06-08 | Minolta Camera Kabushiki Kaisha | Camera with a multi-zone focus detecting device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5115432A (en) * | 1974-07-29 | 1976-02-06 | Yashica Co Ltd | GOSHOTENKENSHUTSUSOCHI |
JPS5123138A (en) * | 1974-08-20 | 1976-02-24 | Canon Kk | ICHIGANREFURETSUKUSUKAMERA |
JPS5267322A (en) * | 1975-12-02 | 1977-06-03 | Masayoshi Yoshimura | Focusing device |
-
1979
- 1979-11-26 JP JP15273279A patent/JPS5675608A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5115432A (en) * | 1974-07-29 | 1976-02-06 | Yashica Co Ltd | GOSHOTENKENSHUTSUSOCHI |
JPS5123138A (en) * | 1974-08-20 | 1976-02-24 | Canon Kk | ICHIGANREFURETSUKUSUKAMERA |
JPS5267322A (en) * | 1975-12-02 | 1977-06-03 | Masayoshi Yoshimura | Focusing device |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS591012U (en) * | 1982-06-25 | 1984-01-06 | 日本精密工業株式会社 | automatic focus adjustment device |
JPS59116604A (en) * | 1982-11-22 | 1984-07-05 | Olympus Optical Co Ltd | Focus detection |
JPH0534659B2 (en) * | 1982-11-22 | 1993-05-24 | Olympus Optical Co | |
JPS59140426A (en) * | 1983-02-01 | 1984-08-11 | Kyocera Corp | Motor control device of lens interchangeable automatic focusing camera |
JPS59159115A (en) * | 1983-03-01 | 1984-09-08 | Nippon Kogaku Kk <Nikon> | Automatic focusing device |
JPS6036906A (en) * | 1983-08-09 | 1985-02-26 | Konishiroku Photo Ind Co Ltd | Photoelectric type distance measuring apparatus |
JPH0473762B2 (en) * | 1983-08-09 | 1992-11-24 | ||
JPS6037513A (en) * | 1983-08-11 | 1985-02-26 | Nippon Kogaku Kk <Nikon> | Shift amount detector |
US5079582A (en) * | 1985-01-14 | 1992-01-07 | Minolta Camera Kabushiki Kaisha | Automatic focus adjusting apparatus |
US5001509A (en) * | 1985-01-17 | 1991-03-19 | Minolta Camera Kabushiki Kaisha | Automatic focus adjusting apparatus |
US4888609A (en) * | 1985-01-17 | 1989-12-19 | Minolta Camera Kabushiki Kaisha | Automatic focus adjusting apparatus |
JPS6225716A (en) * | 1985-07-26 | 1987-02-03 | Minolta Camera Co Ltd | Deviation detecting device for correlation image |
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 |
US5168299A (en) * | 1986-05-16 | 1992-12-01 | Minolta Camera Co., Ltd. | Camera with a multi-zone focus detecting device |
US5218395A (en) * | 1986-05-16 | 1993-06-08 | Minolta Camera Kabushiki Kaisha | Camera with a multi-zone focus detecting device |
JPH0333707A (en) * | 1990-07-03 | 1991-02-14 | Minolta Camera Co Ltd | Focus detector |
Also Published As
Publication number | Publication date |
---|---|
JPH022130B2 (en) | 1990-01-17 |
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