JPS57161712A - Focusing detector - Google Patents

Focusing detector

Info

Publication number
JPS57161712A
JPS57161712A JP4609181A JP4609181A JPS57161712A JP S57161712 A JPS57161712 A JP S57161712A JP 4609181 A JP4609181 A JP 4609181A JP 4609181 A JP4609181 A JP 4609181A JP S57161712 A JPS57161712 A JP S57161712A
Authority
JP
Japan
Prior art keywords
signal
prescribed
integral value
output
picture
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
JP4609181A
Other languages
Japanese (ja)
Inventor
Kenichi Oikami
Masatoshi Ida
Asao Hayashi
Masahiro Aoki
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 Corp
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 Corp, Olympus Optical Co Ltd filed Critical Olympus Corp
Priority to JP4609181A priority Critical patent/JPS57161712A/en
Publication of JPS57161712A publication Critical patent/JPS57161712A/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)

Abstract

PURPOSE:To achieve focus detection accurately all the time by sampling and holding each integral value of each photodetecting element under prescribed conditions. CONSTITUTION:Each integral value of each photodetecting element and a signal having a prescribed level from a parallel type D/A converter 20 are supplied to comparators 19-1-19-n through sample holding circuits 18A and 18B. Then, while neither an inverted signal detecting means 24 nor a timer means 26 is in operation, the integral value of each photoelectric output is sampled and held as picture-element information. Then, a prescribed analog signal is supplied to respective comparators 19 and when the output of an optional comparator is inverted, the output of a counter 21 is written in a memory which corresponds to said comparator; and the picture-element information is converted into a digital signal and the converted signal is processed at a part 5 on the basis of a prescribed estimation function, thus detecting the focus state of an object image.
JP4609181A 1981-03-28 1981-03-28 Focusing detector Pending JPS57161712A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4609181A JPS57161712A (en) 1981-03-28 1981-03-28 Focusing detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4609181A JPS57161712A (en) 1981-03-28 1981-03-28 Focusing detector

Publications (1)

Publication Number Publication Date
JPS57161712A true JPS57161712A (en) 1982-10-05

Family

ID=12737314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4609181A Pending JPS57161712A (en) 1981-03-28 1981-03-28 Focusing detector

Country Status (1)

Country Link
JP (1) JPS57161712A (en)

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