JPS5483424A - Automatic focusing device - Google Patents

Automatic focusing device

Info

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
Application number
JP15125577A
Other languages
Japanese (ja)
Inventor
Tatsuya Shimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15125577A priority Critical patent/JPS5483424A/en
Publication of JPS5483424A publication Critical patent/JPS5483424A/en
Pending legal-status Critical Current

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
JP15125577A 1977-12-15 1977-12-15 Automatic focusing device Pending JPS5483424A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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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