JPS56146108A - Focusing detection system - Google Patents

Focusing detection system

Info

Publication number
JPS56146108A
JPS56146108A JP4860480A JP4860480A JPS56146108A JP S56146108 A JPS56146108 A JP S56146108A JP 4860480 A JP4860480 A JP 4860480A JP 4860480 A JP4860480 A JP 4860480A JP S56146108 A JPS56146108 A JP S56146108A
Authority
JP
Japan
Prior art keywords
optical system
image information
focus detection
accomplished
picture element
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
JP4860480A
Other languages
Japanese (ja)
Inventor
Takeomi Suzuki
Masahiro Aoki
Kenichi Oikami
Hideshi Kenjo
Masatoshi Ida
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP4860480A priority Critical patent/JPS56146108A/en
Publication of JPS56146108A publication Critical patent/JPS56146108A/en
Pending 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)
  • Focusing (AREA)

Abstract

PURPOSE:To increase processing speed and perform accurate focus detection by performing AD conversion of image information in parallel with one AD converter. CONSTITUTION:Part of the image of an object 1 is passed through a photographing optical system 2 and is projected into a photodetector 3 having multiple photodetecting regions (picture element regions). After the image information is converted parallelly to digital information by an AC conversion circuit 4, it is taken into a central processing unit 5. Here, the absolute values of the difference in the digital values corresponding to the image information of, for example, adjacent picture element regions are calculated and the focus detection signal expressing the total sum of these absolute values as an evaluation function is obtained. This signal is displayed in a display device 6, and displaces the optical system 2 in the optical axis direction shown by an arrow by way of an optical system driving circuit 7 and an optical system driving device 8, whereby focus controlling is accomplished. Thereby, the processing speed is increased and the accurate focus detection is accomplished.
JP4860480A 1980-04-15 1980-04-15 Focusing detection system Pending JPS56146108A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4860480A JPS56146108A (en) 1980-04-15 1980-04-15 Focusing detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4860480A JPS56146108A (en) 1980-04-15 1980-04-15 Focusing detection system

Publications (1)

Publication Number Publication Date
JPS56146108A true JPS56146108A (en) 1981-11-13

Family

ID=12808006

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4860480A Pending JPS56146108A (en) 1980-04-15 1980-04-15 Focusing detection system

Country Status (1)

Country Link
JP (1) JPS56146108A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53116852A (en) * 1977-03-23 1978-10-12 Olympus Optical Co Ltd Automatic focus adjusting system
JPS53127190A (en) * 1977-04-04 1978-11-07 Masao Shiotani Tools for covering surfaces for artificial fish shelters

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53116852A (en) * 1977-03-23 1978-10-12 Olympus Optical Co Ltd Automatic focus adjusting system
JPS53127190A (en) * 1977-04-04 1978-11-07 Masao Shiotani Tools for covering surfaces for artificial fish shelters

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