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JPS57212407A - Focusing detection controller - Google Patents

Focusing detection controller

Info

Publication number
JPS57212407A
JPS57212407A JP56097661A JP9766181A JPS57212407A JP S57212407 A JPS57212407 A JP S57212407A JP 56097661 A JP56097661 A JP 56097661A JP 9766181 A JP9766181 A JP 9766181A JP S57212407 A JPS57212407 A JP S57212407A
Authority
JP
Japan
Prior art keywords
signal
control circuit
circuit
mode
photographing mode
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
JP56097661A
Other languages
Japanese (ja)
Inventor
Toshitatsu Suzuki
Tamio Murano
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 JP56097661A priority Critical patent/JPS57212407A/en
Publication of JPS57212407A publication Critical patent/JPS57212407A/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)
  • Focusing (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To ensure the stable shift and halt of an optical system in the photographing mode when an optical driving motor is controlled by a control circuit after detecting whether the image-forming optical system is at the focal point or not, by applying a focusing signal to a motor control circuit in the photographinc mode. CONSTITUTION:The motor locking signal S given from a control circuit 10 is set at a low level with the gates TG2 and TG4 closed and the gates TG1 and TG3 opened respectively in a mode excepting the photographing mode. The output signal of a difference detecting circuit 7 is fed to a motor control circuit 11 and a display device 12, and a lens 9 is rolled in/out in accordance with the output signal. In the photographing mode, the signal S is set at a high level with each gate reversed. Then the distance measuring signal given from the circuit 7 is latched at a D-FF with the rise of the signal S. Accordingly the reference potential (focusing signal) is fed to the circuit 11, and a lens driving motor is stopped. At the same time, the lens position is displayed in the photographing mode when the process proceeds to the photographing sequence.
JP56097661A 1981-06-24 1981-06-24 Focusing detection controller Pending JPS57212407A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56097661A JPS57212407A (en) 1981-06-24 1981-06-24 Focusing detection controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56097661A JPS57212407A (en) 1981-06-24 1981-06-24 Focusing detection controller

Publications (1)

Publication Number Publication Date
JPS57212407A true JPS57212407A (en) 1982-12-27

Family

ID=14198240

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56097661A Pending JPS57212407A (en) 1981-06-24 1981-06-24 Focusing detection controller

Country Status (1)

Country Link
JP (1) JPS57212407A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61267744A (en) * 1986-04-16 1986-11-27 Minolta Camera Co Ltd Camera with automatic focusing device
US4671640A (en) * 1984-08-09 1987-06-09 Minolta Camera Kabushiki Kaisha Automatic focus control camera
US4882601A (en) * 1986-05-16 1989-11-21 Minolta Camera Kabushiki Kaisha Camera with an automatic focusing device
US4888609A (en) * 1985-01-17 1989-12-19 Minolta Camera Kabushiki Kaisha Automatic focus adjusting apparatus
US4910548A (en) * 1986-05-16 1990-03-20 Minolta Camera Kabushiki Kaisha Camera with a multi-zone focus detecting device
US5168299A (en) * 1986-05-16 1992-12-01 Minolta Camera Co., Ltd. Camera with a multi-zone focus detecting device
US5218395A (en) * 1986-05-16 1993-06-08 Minolta Camera Kabushiki Kaisha Camera with a multi-zone focus detecting device

Cited By (10)

* 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
US5079582A (en) * 1985-01-14 1992-01-07 Minolta Camera Kabushiki Kaisha Automatic focus adjusting apparatus
US4888609A (en) * 1985-01-17 1989-12-19 Minolta Camera Kabushiki Kaisha Automatic focus adjusting apparatus
US5001509A (en) * 1985-01-17 1991-03-19 Minolta Camera Kabushiki Kaisha Automatic focus adjusting apparatus
JPS61267744A (en) * 1986-04-16 1986-11-27 Minolta Camera Co Ltd Camera with automatic focusing device
US4882601A (en) * 1986-05-16 1989-11-21 Minolta Camera Kabushiki Kaisha Camera with an automatic focusing device
US4910548A (en) * 1986-05-16 1990-03-20 Minolta Camera Kabushiki Kaisha Camera with a multi-zone focus detecting device
US5168299A (en) * 1986-05-16 1992-12-01 Minolta Camera Co., Ltd. Camera with a multi-zone focus detecting device
US5218395A (en) * 1986-05-16 1993-06-08 Minolta Camera Kabushiki Kaisha Camera with a multi-zone focus detecting device

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