JPS57185423A - Focusing device - Google Patents

Focusing device

Info

Publication number
JPS57185423A
JPS57185423A JP56069301A JP6930181A JPS57185423A JP S57185423 A JPS57185423 A JP S57185423A JP 56069301 A JP56069301 A JP 56069301A JP 6930181 A JP6930181 A JP 6930181A JP S57185423 A JPS57185423 A JP S57185423A
Authority
JP
Japan
Prior art keywords
focusing
signal
circuit
display
region
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
JP56069301A
Other languages
Japanese (ja)
Inventor
Makoto Kimura
Nobuhiko Terui
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.)
Nikon Corp
Original Assignee
Nikon Corp
Nippon Kogaku KK
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 Nikon Corp, Nippon Kogaku KK filed Critical Nikon Corp
Priority to JP56069301A priority Critical patent/JPS57185423A/en
Publication of JPS57185423A publication Critical patent/JPS57185423A/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)
  • Viewfinders (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To realize both accurate focusing and rough focusing, by displaying a focusing display in an accurate focusing display and a focusing display within the depth decided by the set aperture value. CONSTITUTION:The signal supplied from a focus detecting circuit 4 is supplied to discriminating circuits 5 and 6. The circuit 5 delivers a focusing signal when the signal of the circuit 4 is within a focusing region D0 having a prescribed width; while the circuit 6 delivers the focusing signal when the signal of the circuit 4 is within a focusing region D1 or D2 which vary according to the aperture value. Receiving these focusing signals, a display controlling circuit 7 controls a display device 8 and performs the displays in response to the regions D0-D2. For instance, the center LED glows when the signal is within the region D0; and the left or right LED glows when the signal is within the regions D1 or D2, respectively. With such focusing displays, the accurate focusing or the rough focusing is possible.
JP56069301A 1981-05-11 1981-05-11 Focusing device Pending JPS57185423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56069301A JPS57185423A (en) 1981-05-11 1981-05-11 Focusing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56069301A JPS57185423A (en) 1981-05-11 1981-05-11 Focusing device

Publications (1)

Publication Number Publication Date
JPS57185423A true JPS57185423A (en) 1982-11-15

Family

ID=13398602

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56069301A Pending JPS57185423A (en) 1981-05-11 1981-05-11 Focusing device

Country Status (1)

Country Link
JP (1) JPS57185423A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59206806A (en) * 1983-05-10 1984-11-22 Minolta Camera Co Ltd Focusing state checker
US4924250A (en) * 1986-03-31 1990-05-08 Minolta Camera Kabushiki Kaisha Automatic focus control device
US5040015A (en) * 1986-03-31 1991-08-13 Minolta Camera Kabushiki Kaisha Automatic focus control device
US5192966A (en) * 1986-03-31 1993-03-09 Minolta Camera Kabushiki Kaisha Automatic focus control device
US5196881A (en) * 1986-03-31 1993-03-23 Minolta Camera Kabushiki Kaisha Automatic focus control device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59206806A (en) * 1983-05-10 1984-11-22 Minolta Camera Co Ltd Focusing state checker
US4924250A (en) * 1986-03-31 1990-05-08 Minolta Camera Kabushiki Kaisha Automatic focus control device
US5040015A (en) * 1986-03-31 1991-08-13 Minolta Camera Kabushiki Kaisha Automatic focus control device
US5192966A (en) * 1986-03-31 1993-03-09 Minolta Camera Kabushiki Kaisha Automatic focus control device
US5196881A (en) * 1986-03-31 1993-03-23 Minolta Camera Kabushiki Kaisha Automatic focus control device
US5319412A (en) * 1986-03-31 1994-06-07 Minolta Camera Kabushiki Kaisha Automatic focus control device

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