JPS5694334A - Automatic focusing camera - Google Patents
Automatic focusing cameraInfo
- Publication number
- JPS5694334A JPS5694334A JP17382579A JP17382579A JPS5694334A JP S5694334 A JPS5694334 A JP S5694334A JP 17382579 A JP17382579 A JP 17382579A JP 17382579 A JP17382579 A JP 17382579A JP S5694334 A JPS5694334 A JP S5694334A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- outputs
- run
- focusing
- comparators
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Optics & Photonics (AREA)
- Automatic Focus Adjustment (AREA)
- Focusing (AREA)
Abstract
PURPOSE: To make construction simple by running a focusing motor at a high speed when a photographic lens is away from the focusing position and at a low speed when it is near the same, and running the motor reversely via switches in infinite and shortest distance photographing positions.
CONSTITUTION: The outputs of two photoelectric elements 9, 10 which are provided in equivalent positions on the film plane by leaving a micro distance are passed through a differential amplifier and are compared with threshold values Vr+, Vr- in comparators 16, 17. Depending upon which output is L, the moving direction of a photographic lens is judged. The outputs thereof run a motor 31 via gates 21, 22, FF 23, gates 28, 29 and an amplifier 30. The outputs of the photoelectric elements 9, 10 are compared with Vr+ in comparators 18, 19, and run the motor 31 slowly near the focusing region and fast away from there via a gate 20 then through an oscillating circuit 32, and a gate 27. In infinite and shortest photographing positions, switches 24, 25 go on to run the motor 31 reversely. Hence, the construction is made simple.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17382579A JPS5694334A (en) | 1979-12-27 | 1979-12-27 | Automatic focusing camera |
DE19803049233 DE3049233C2 (en) | 1979-12-27 | 1980-12-27 | Photographic camera with automatic focus |
GB8041420A GB2069286B (en) | 1979-12-27 | 1980-12-29 | Photographic camera of automatic focussing type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17382579A JPS5694334A (en) | 1979-12-27 | 1979-12-27 | Automatic focusing camera |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5694334A true JPS5694334A (en) | 1981-07-30 |
JPH0226207B2 JPH0226207B2 (en) | 1990-06-08 |
Family
ID=15967845
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17382579A Granted JPS5694334A (en) | 1979-12-27 | 1979-12-27 | Automatic focusing camera |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS5694334A (en) |
GB (1) | GB2069286B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5779922A (en) * | 1980-11-07 | 1982-05-19 | Nippon Kogaku Kk <Nikon> | Automatic focusing camera |
JPS58214130A (en) * | 1982-06-04 | 1983-12-13 | West Electric Co Ltd | Automatic focus controller |
JPS599610A (en) * | 1982-07-09 | 1984-01-19 | Hitachi Denshi Ltd | Automatic focusing device |
JPS5924811A (en) * | 1982-08-02 | 1984-02-08 | Hitachi Denshi Ltd | Automatic focusing device |
JPS5961823A (en) * | 1982-10-01 | 1984-04-09 | Matsushita Electric Ind Co Ltd | Lens driving device |
JPS62226114A (en) * | 1986-03-27 | 1987-10-05 | Nikon Corp | Automatic focusing device |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2598218A1 (en) * | 1986-04-30 | 1987-11-06 | Commissariat Energie Atomique | CONTACTLESS LINEAR MEASURING SENSOR OF THE DISTANCE OF A TARGET BY RETROFUL RADIATION |
DE4004530C2 (en) * | 1990-02-14 | 1999-07-29 | Stefan Reich | Optical distance measurement |
EP1380811B2 (en) | 2002-07-03 | 2013-08-07 | Optosys SA | Optical distance measuring device |
CN109491091B (en) * | 2019-01-10 | 2024-04-16 | 京东方科技集团股份有限公司 | Optical system applied to VRAR system and focusing method thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS495623A (en) * | 1972-05-06 | 1974-01-18 | ||
JPS49114422A (en) * | 1973-02-28 | 1974-10-31 | ||
JPS544121A (en) * | 1977-06-06 | 1979-01-12 | Honeywell Inc | Automatic focus device |
-
1979
- 1979-12-27 JP JP17382579A patent/JPS5694334A/en active Granted
-
1980
- 1980-12-29 GB GB8041420A patent/GB2069286B/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS495623A (en) * | 1972-05-06 | 1974-01-18 | ||
JPS49114422A (en) * | 1973-02-28 | 1974-10-31 | ||
JPS544121A (en) * | 1977-06-06 | 1979-01-12 | Honeywell Inc | Automatic focus device |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5779922A (en) * | 1980-11-07 | 1982-05-19 | Nippon Kogaku Kk <Nikon> | Automatic focusing camera |
JPS6356961B2 (en) * | 1980-11-07 | 1988-11-09 | Nippon Kogaku Kk | |
JPS58214130A (en) * | 1982-06-04 | 1983-12-13 | West Electric Co Ltd | Automatic focus controller |
JPS599610A (en) * | 1982-07-09 | 1984-01-19 | Hitachi Denshi Ltd | Automatic focusing device |
JPS5924811A (en) * | 1982-08-02 | 1984-02-08 | Hitachi Denshi Ltd | Automatic focusing device |
JPS5961823A (en) * | 1982-10-01 | 1984-04-09 | Matsushita Electric Ind Co Ltd | Lens driving device |
JPS62226114A (en) * | 1986-03-27 | 1987-10-05 | Nikon Corp | Automatic focusing device |
Also Published As
Publication number | Publication date |
---|---|
GB2069286B (en) | 1984-02-29 |
JPH0226207B2 (en) | 1990-06-08 |
GB2069286A (en) | 1981-08-19 |
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