JPS57197524A - Automatic focusing camera - Google Patents
Automatic focusing cameraInfo
- Publication number
- JPS57197524A JPS57197524A JP8266881A JP8266881A JPS57197524A JP S57197524 A JPS57197524 A JP S57197524A JP 8266881 A JP8266881 A JP 8266881A JP 8266881 A JP8266881 A JP 8266881A JP S57197524 A JPS57197524 A JP S57197524A
- Authority
- JP
- Japan
- Prior art keywords
- lenses
- driven
- range finding
- signal
- retrieval
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
- G03B3/10—Power-operated focusing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE:To reduce range finding time, by making an AF operation possible according to each lens, through the movement of the lenses to the next retrieval position, if the range finding detection is impossible at the first position of a distance adjusting mechanism. CONSTITUTION:If a sufficient range finding signal is not obtained at the initial lens position, an output of an amplifier 45 goes to L, a signal from an oscillator 59 is given to a terminal 60 via an AND gate 49 and a down counter 37 counts down. A retrieval helicoid position signal is outputted from a lens side ROM 62 with the address designation of the counter 37, and the lenses are driven to the said position with a motor 58, an FF35 is inverted through the end of driving to check whether the servo is again possible or not. If possible, the motor 58 is driven with an amplifier 52 to perform the servo AF and is impossible, the lenses are driven to a new retrieval position.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8266881A JPS57197524A (en) | 1981-05-29 | 1981-05-29 | Automatic focusing camera |
| US06/380,438 US4416523A (en) | 1981-05-28 | 1982-05-20 | Automatic focusing system |
| DE19823219809 DE3219809A1 (en) | 1981-05-28 | 1982-05-26 | AUTOMATIC FOCUSING SYSTEM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8266881A JPS57197524A (en) | 1981-05-29 | 1981-05-29 | Automatic focusing camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57197524A true JPS57197524A (en) | 1982-12-03 |
Family
ID=13780802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8266881A Pending JPS57197524A (en) | 1981-05-28 | 1981-05-29 | Automatic focusing camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57197524A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4561750A (en) * | 1983-07-28 | 1985-12-31 | Canon Kabushiki Kaisha | In-focus state detection device |
| US4602861A (en) * | 1982-12-23 | 1986-07-29 | Minolta Camera Kabushiki Kaisha | Auto-focusing system |
| WO2002010825A1 (en) * | 2000-07-31 | 2002-02-07 | Sanyo Electric Co., Ltd. | Electronic camera and focus controlling method |
-
1981
- 1981-05-29 JP JP8266881A patent/JPS57197524A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4602861A (en) * | 1982-12-23 | 1986-07-29 | Minolta Camera Kabushiki Kaisha | Auto-focusing system |
| US4561750A (en) * | 1983-07-28 | 1985-12-31 | Canon Kabushiki Kaisha | In-focus state detection device |
| WO2002010825A1 (en) * | 2000-07-31 | 2002-02-07 | Sanyo Electric Co., Ltd. | Electronic camera and focus controlling method |
| US7733410B2 (en) | 2000-07-31 | 2010-06-08 | Sanyo Electric Co., Ltd. | Electronic camera and focus control method which minimizes the time required for adjusting a focus |
| US8514320B2 (en) | 2000-07-31 | 2013-08-20 | Sanyo Electric Co., Ltd. | Electronic camera and focus control method which minimizes the time required for adjusting a focus |
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