JPS5726812A - Focus control device - Google Patents
Focus control deviceInfo
- Publication number
- JPS5726812A JPS5726812A JP10166380A JP10166380A JPS5726812A JP S5726812 A JPS5726812 A JP S5726812A JP 10166380 A JP10166380 A JP 10166380A JP 10166380 A JP10166380 A JP 10166380A JP S5726812 A JPS5726812 A JP S5726812A
- Authority
- JP
- Japan
- Prior art keywords
- photographed
- signal
- optical axis
- point
- striped pattern
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/40—Optical focusing aids
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE:To execute focusing precisely, by projecting a pattern which has been placed at a conjugate position to the surface of an object to be photographed on an optical axis so as to be slightly inclined against the optical axis, on the object to be photographed, and providing an image pickup means of its projected image. CONSTITUTION:A striped pattern on a negative 9 which has been placed at an image formation position of an object 1 to be photographed, so as to be slightly inclined against an optical axis 6 is projected on the object 1 to be photographed, through a light source 10. Said striped pattern is reflected on an image sensor 8 through semitransparent mirrors 5, 7, and a signal (b) is outputted from an operating circuit 18. This signal (b) is inputted through a wave detector 19 and a shaping circuit 20 to an FF 21 which is set by a synchronizing signal (a), and outputs a square wave (e). The signal (e) is compared with a reference signal Es by a comparator 23 through an averaging circuit 22. A motor 17 is controlled through a driving circuit 24 by a differential output of the comparator 23 so that an image formation point P on the object to be photographed, of the striped pattern coincides with a point on the optical axis of the object to be photographed, and when P coincides with the point S, the motor 17 is stopped, and forcusing is executed precisely.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10166380A JPS5726812A (en) | 1980-07-23 | 1980-07-23 | Focus control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10166380A JPS5726812A (en) | 1980-07-23 | 1980-07-23 | Focus control device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5726812A true JPS5726812A (en) | 1982-02-13 |
Family
ID=14306605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10166380A Pending JPS5726812A (en) | 1980-07-23 | 1980-07-23 | Focus control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5726812A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01310716A (en) * | 1988-06-07 | 1989-12-14 | Daiken Trade & Ind Co Ltd | Dehumidifier |
-
1980
- 1980-07-23 JP JP10166380A patent/JPS5726812A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01310716A (en) * | 1988-06-07 | 1989-12-14 | Daiken Trade & Ind Co Ltd | Dehumidifier |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54155832A (en) | Focusing detector | |
JPS54126023A (en) | Optical device | |
JPS5764217A (en) | Automatic focusing camera | |
JPS5449147A (en) | Recorder | |
JPS5773709A (en) | Focusing-point detector | |
JPS5726812A (en) | Focus control device | |
JPS54140532A (en) | Automatic focus adjustor | |
JPS57154206A (en) | Focusing device | |
JPS5764204A (en) | Automatic focus controller | |
JPS5461522A (en) | Automatic focusing device | |
JPH0473130B2 (en) | ||
JPS556361A (en) | Focus measuring position assigning device in auto-focusing camera | |
JPS6463963A (en) | Light transmitting device | |
JPS5471652A (en) | Automatic dimmer for microscope light source | |
JPS55106425A (en) | Single-lens reflex camera | |
JPS5759326A (en) | Method for detection of image-forming position and device thereof | |
IE782563L (en) | Focus control system | |
JPS6417030A (en) | Image pickup device | |
SU637976A2 (en) | Tv camera aperture automatic control device | |
JPS54106253A (en) | Automatic focusing device | |
JPS52136621A (en) | Focusing control device for camera | |
JPS55120020A (en) | Focus detection and indicating device of camera | |
JPS5567732A (en) | Finder optical system | |
JPS54134424A (en) | Automatic focusing device for single lens reflex camera | |
JPS56128923A (en) | Focus detector |