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JPS5719703A - Range-finding system - Google Patents

Range-finding system

Info

Publication number
JPS5719703A
JPS5719703A JP9416580A JP9416580A JPS5719703A JP S5719703 A JPS5719703 A JP S5719703A JP 9416580 A JP9416580 A JP 9416580A JP 9416580 A JP9416580 A JP 9416580A JP S5719703 A JPS5719703 A JP S5719703A
Authority
JP
Japan
Prior art keywords
photodetector
arrays
decided
array
detectors
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
Application number
JP9416580A
Other languages
Japanese (ja)
Other versions
JPS6255641B2 (en
Inventor
Ikuo Maeda
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP9416580A priority Critical patent/JPS5719703A/en
Publication of JPS5719703A publication Critical patent/JPS5719703A/en
Publication of JPS6255641B2 publication Critical patent/JPS6255641B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Measurement Of Optical Distance (AREA)

Abstract

PURPOSE:To decide focusing state by utilizing a peak of an output, while the disposition of photodetector-arrays are made to be less significant, by disposing one of the photodetector-arrays vertically to an optical axis and the other of arrays obliquely, at a position corresponding to an image forming surface. CONSTITUTION:At a position of an image forming surface P of a lens L, the 1st photodetector-array SA is disposed vertically to an optical axis, the 2nd photodetector-array SB is disposed obliquely to this axis, and these arrays output image signals VA, VB respectively. Despite the positions of the detectors in each array, if there is a relation VA'>=VB' between contrast distributions VA', VB' of the image signals VA, VB a focusing state is decided. And, if VA'<VB' in a domain of detectors in rear of position (m) of the detector corresponding to the position P of the image forming surface, a state is decided as a rear focus; if VA'<VB' in a domain of front detectors, a state is decided as a front focus.
JP9416580A 1980-07-10 1980-07-10 Range-finding system Granted JPS5719703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9416580A JPS5719703A (en) 1980-07-10 1980-07-10 Range-finding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9416580A JPS5719703A (en) 1980-07-10 1980-07-10 Range-finding system

Publications (2)

Publication Number Publication Date
JPS5719703A true JPS5719703A (en) 1982-02-02
JPS6255641B2 JPS6255641B2 (en) 1987-11-20

Family

ID=14102746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9416580A Granted JPS5719703A (en) 1980-07-10 1980-07-10 Range-finding system

Country Status (1)

Country Link
JP (1) JPS5719703A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5949904U (en) * 1982-09-27 1984-04-03 三菱電機株式会社 distance measuring device
JPS63111413A (en) * 1986-10-30 1988-05-16 Nippon Denso Co Ltd Optical distance measuring instrument
FR2923619A1 (en) * 2007-11-13 2009-05-15 Thales Sa DEVICE FOR FAULT MEASUREMENT OF AN OPTOELECTRONIC SENSOR IMAGING INSTRUMENT AND CORRECTION DEVICE COMPRISING SAME

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5949904U (en) * 1982-09-27 1984-04-03 三菱電機株式会社 distance measuring device
JPS63111413A (en) * 1986-10-30 1988-05-16 Nippon Denso Co Ltd Optical distance measuring instrument
FR2923619A1 (en) * 2007-11-13 2009-05-15 Thales Sa DEVICE FOR FAULT MEASUREMENT OF AN OPTOELECTRONIC SENSOR IMAGING INSTRUMENT AND CORRECTION DEVICE COMPRISING SAME
WO2009062890A1 (en) * 2007-11-13 2009-05-22 Thales Device for measuring the defects of an imaging instrument with two opto-electronic sensors
RU2476914C2 (en) * 2007-11-13 2013-02-27 Таль Apparatus for measuring defects of image forming apparatus with two optoelectronic sensors
US8415599B2 (en) 2007-11-13 2013-04-09 Thales Device for measuring the defects of an imaging instrument with two opto-electronic sensors

Also Published As

Publication number Publication date
JPS6255641B2 (en) 1987-11-20

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