JPS5483424A - Automatic focusing device - Google Patents
Automatic focusing deviceInfo
- Publication number
- JPS5483424A JPS5483424A JP15125577A JP15125577A JPS5483424A JP S5483424 A JPS5483424 A JP S5483424A JP 15125577 A JP15125577 A JP 15125577A JP 15125577 A JP15125577 A JP 15125577A JP S5483424 A JPS5483424 A JP S5483424A
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- constitution
- hence
- accomplished
- optical axis
- 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
Landscapes
- Automatic Focus Adjustment (AREA)
- Focusing (AREA)
Abstract
PURPOSE: To simplify constitution by moving a lens according to the electrical scanning of the line sensor of the face inclined to the direction perpendicular to optical axis.
CONSTITUTION: The subject light having gone through an objective lens 1 and reflected on a half mirror 2 images at the central part of a line sensor 4 of the face inclined to the direction perpendicular to the optical axis. Hence, if the differential component of the detection output of the sensor 4 and the output through a delay circuit 6 by a differential amplifier 7 is processed in a cilipper circuit 8, polarity inversion circuit 9, adder 10 and LPF 11 and the movement of the lens 1 is so controlled that the detection output in the central part of the sensor 4 becomes maximum by way of a phase comparator 12 to which the saw tooth waveform signal synchronized to the line frequency scan-driving the sensor 4 is applied, then focusing is accomplished. Hence, forcusing is accomplished by electrical scanning without machanically moving the image plane, and the constitution of the device becomes simple.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15125577A JPS5483424A (en) | 1977-12-15 | 1977-12-15 | Automatic focusing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15125577A JPS5483424A (en) | 1977-12-15 | 1977-12-15 | Automatic focusing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5483424A true JPS5483424A (en) | 1979-07-03 |
Family
ID=15514656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15125577A Pending JPS5483424A (en) | 1977-12-15 | 1977-12-15 | Automatic focusing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5483424A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56154713A (en) * | 1980-04-30 | 1981-11-30 | Toshiba Corp | Focusing device |
WO2002003105A3 (en) * | 2000-07-05 | 2003-01-23 | Psc Scanning Inc | Autofocus apparaturs and method of using the same |
US6963074B2 (en) | 2001-06-21 | 2005-11-08 | Psc Scanning, Inc. | Omni-directional optical code reader using scheimpflug optics |
-
1977
- 1977-12-15 JP JP15125577A patent/JPS5483424A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56154713A (en) * | 1980-04-30 | 1981-11-30 | Toshiba Corp | Focusing device |
WO2002003105A3 (en) * | 2000-07-05 | 2003-01-23 | Psc Scanning Inc | Autofocus apparaturs and method of using the same |
US6689998B1 (en) | 2000-07-05 | 2004-02-10 | Psc Scanning, Inc. | Apparatus for optical distancing autofocus and imaging and method of using the same |
US6963074B2 (en) | 2001-06-21 | 2005-11-08 | Psc Scanning, Inc. | Omni-directional optical code reader using scheimpflug optics |
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