JPS5746216A - Automatic focusing camera - Google Patents

Automatic focusing camera

Info

Publication number
JPS5746216A
JPS5746216A JP12230280A JP12230280A JPS5746216A JP S5746216 A JPS5746216 A JP S5746216A JP 12230280 A JP12230280 A JP 12230280A JP 12230280 A JP12230280 A JP 12230280A JP S5746216 A JPS5746216 A JP S5746216A
Authority
JP
Japan
Prior art keywords
signals
space frequency
outputted
showing
lens
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
JP12230280A
Other languages
Japanese (ja)
Inventor
Nobuhiko Terui
Nobuo Okabe
Yosuke Kusaka
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.)
NIPPON KOUGAKU KOGYO KK
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
NIPPON KOUGAKU KOGYO KK
Nippon Chemical Industrial Co Ltd
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 NIPPON KOUGAKU KOGYO KK, Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical NIPPON KOUGAKU KOGYO KK
Priority to JP12230280A priority Critical patent/JPS5746216A/en
Priority to DE19813134654 priority patent/DE3134654A1/en
Publication of JPS5746216A publication Critical patent/JPS5746216A/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
    • G02B7/34—Systems for automatic generation of focusing signals using different areas in a pupil plane

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)

Abstract

PURPOSE: To execute the automatic focusing at high-speed response and with high accuracy, by varying a lens driving speed in accordance with whether a lens is within a prescribed range in the proximity of a focusing position or not.
CONSTITUTION: Outputs of the first and second photoelectric element groups 1, 2 are inputted to space frequency component extracting circuits 3, 4, and signals V1, V1' showing the first space frequency components, signals V2, V2' showing the second space frequency component, and total light quantity signals r0, r0' of an incident light beam are outputted. The signals showing the first and second space frequency components are inputted to circuits 14W17, and their absolute values r1, r2, r1' and r2' are outputted. These signals are brought to a prescribed operation, and after that, a correlation output (|V1-V1'|+|V2-V2'|+|r0 -ro'|)/(r1+r2+ r1'+r2') is obtained as an input of a comparing circuit 20. When the lens is within the prescribed range in the proximity of the focusing position, an H level output is outputted from the comparing circuit, a motor is driven intermittently, and its speed is decreased.
COPYRIGHT: (C)1982,JPO&Japio
JP12230280A 1980-09-05 1980-09-05 Automatic focusing camera Pending JPS5746216A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP12230280A JPS5746216A (en) 1980-09-05 1980-09-05 Automatic focusing camera
DE19813134654 DE3134654A1 (en) 1980-09-05 1981-09-02 Focusing device for a camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12230280A JPS5746216A (en) 1980-09-05 1980-09-05 Automatic focusing camera

Publications (1)

Publication Number Publication Date
JPS5746216A true JPS5746216A (en) 1982-03-16

Family

ID=14832588

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12230280A Pending JPS5746216A (en) 1980-09-05 1980-09-05 Automatic focusing camera

Country Status (2)

Country Link
JP (1) JPS5746216A (en)
DE (1) DE3134654A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61112320U (en) * 1984-12-27 1986-07-16
JPS61193439U (en) * 1986-03-27 1986-12-02
US4671640A (en) * 1984-08-09 1987-06-09 Minolta Camera Kabushiki Kaisha Automatic focus control camera
JPH01239514A (en) * 1988-03-22 1989-09-25 Nikon Corp Automatic focus adjusting device
US5525792A (en) * 1990-01-18 1996-06-11 Nikon Corporation Camera having superimposed information display device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5451556A (en) * 1977-09-29 1979-04-23 Canon Inc Distance measuring apparatus
JPS54119232A (en) * 1978-02-23 1979-09-17 Asahi Optical Co Ltd Automatic focusing controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5451556A (en) * 1977-09-29 1979-04-23 Canon Inc Distance measuring apparatus
JPS54119232A (en) * 1978-02-23 1979-09-17 Asahi Optical Co Ltd Automatic focusing controller

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4671640A (en) * 1984-08-09 1987-06-09 Minolta Camera Kabushiki Kaisha Automatic focus control camera
US4791445A (en) * 1984-08-09 1988-12-13 Minolta Camera Kabushiki Kaisha Automatic focus control camera
US4827299A (en) * 1984-08-09 1989-05-02 Minolta Camera Kabushiki Kaisha Automatic focus control camera
US4958183A (en) * 1984-08-09 1990-09-18 Minolta Camera Kabushiki Kaisha Control device for use in a camera system
JPS61112320U (en) * 1984-12-27 1986-07-16
JPS61193439U (en) * 1986-03-27 1986-12-02
JPH01239514A (en) * 1988-03-22 1989-09-25 Nikon Corp Automatic focus adjusting device
US5525792A (en) * 1990-01-18 1996-06-11 Nikon Corporation Camera having superimposed information display device

Also Published As

Publication number Publication date
DE3134654A1 (en) 1982-06-24

Similar Documents

Publication Publication Date Title
JPS53113527A (en) Camera for definite multiplication image in the variable multiplicaton lens system
JPS56132315A (en) Automatic focusing method
JPS57186872A (en) Auto-focusing device of video camera
JPS5770503A (en) Automatic focusing device
JPS5746216A (en) Automatic focusing camera
JPS5686306A (en) Signal processing circuit for distance measuring device
JPS5257825A (en) Automatic focus control device
JPS5694334A (en) Automatic focusing camera
JPS52122038A (en) Fixed noise elimination of solid image sensor
JPS5346726A (en) Exposure controller of cameras
JPS56111841A (en) Exposure control system of camera using physical aperture
JPS56133723A (en) Control circuit for light emission of flash discharging tube
JPS561022A (en) Focus detector of camera
JPS5454632A (en) Photometric circuit of photographing apparatus
JPS5292719A (en) Photographic mode change-over system for camera
JPS54130168A (en) Speed detector
JPS5487421A (en) Binary circuit
JPS52153454A (en) Automatic focus controlling apparatus
JPS5552034A (en) Aperture control system for camera
JPS5552008A (en) Automatic focusing device
JPS5772110A (en) Focus position detector
JPS56126813A (en) Incident position detector of luminous flux
JPS54139726A (en) Preventing method and apparatus for malfunction of auto focus system
JPS555582A (en) Signal processing system for optical detector
JPS55120020A (en) Focus detection and indicating device of camera