JPS5772115A - Output stablizing circuit for focus detector - Google Patents

Output stablizing circuit for focus detector

Info

Publication number
JPS5772115A
JPS5772115A JP55149079A JP14907980A JPS5772115A JP S5772115 A JPS5772115 A JP S5772115A JP 55149079 A JP55149079 A JP 55149079A JP 14907980 A JP14907980 A JP 14907980A JP S5772115 A JPS5772115 A JP S5772115A
Authority
JP
Japan
Prior art keywords
inputted
data
signals
state
displaying
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.)
Granted
Application number
JP55149079A
Other languages
Japanese (ja)
Other versions
JPS642922B2 (en
Inventor
Shinji Sakai
Nobuhiko Shinoda
Mitsuya Hosoe
Takao Kinoshita
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP55149079A priority Critical patent/JPS5772115A/en
Priority to DE19813141182 priority patent/DE3141182A1/en
Publication of JPS5772115A publication Critical patent/JPS5772115A/en
Priority to US06/767,668 priority patent/US4641942A/en
Publication of JPS642922B2 publication Critical patent/JPS642922B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing

Landscapes

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

Abstract

PURPOSE:To perform displaying of a focusing state and the like stably with high accuracy by storing and holding the past state of the signal corresponding to the focusing state, and changing the methods of generation and displaying of the signal according to the combinations of this and fresh signals, with respect to information processing of imaging states of solid-state image sensors and image pickup tubes. CONSTITUTION:In a flicker suppressing circuits FS, the signals of front focus, focusing, and rear focus are outputted from a CPU at every one scanning of a focus detector CCD applying a solid-state image sensor. These signals are inputted to a DFF, and the moment when they are outputted from the CPU, they are inputted to an ROM then inputted to the DFF2 of the next stage by the signal from a timing generator TMGE. In this way, the latest data, the data one time before-data (n-1) times before are transferred in DFF1-DFFn by the timing signals from the TMGE, and in the same manner these data are inputted to the ROM, from which the output data corresponding to their contents are fed to a post-connected display circuit DISP. With such constitution, the displaying of the focusing state or the like is accomplished stably with high accuracy.
JP55149079A 1980-10-16 1980-10-23 Output stablizing circuit for focus detector Granted JPS5772115A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP55149079A JPS5772115A (en) 1980-10-23 1980-10-23 Output stablizing circuit for focus detector
DE19813141182 DE3141182A1 (en) 1980-10-16 1981-10-16 "FOCUS DETECTING SYSTEM"
US06/767,668 US4641942A (en) 1980-10-16 1985-08-21 Focus detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55149079A JPS5772115A (en) 1980-10-23 1980-10-23 Output stablizing circuit for focus detector

Publications (2)

Publication Number Publication Date
JPS5772115A true JPS5772115A (en) 1982-05-06
JPS642922B2 JPS642922B2 (en) 1989-01-19

Family

ID=15467226

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55149079A Granted JPS5772115A (en) 1980-10-16 1980-10-23 Output stablizing circuit for focus detector

Country Status (1)

Country Link
JP (1) JPS5772115A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59226307A (en) * 1983-05-18 1984-12-19 ハネウエル・インコ−ポレ−テツド Decision for focus position of automatic focusing apparatus
US4575212A (en) * 1982-12-28 1986-03-11 Minolta Camera Kabushiki Kaisha Camera with an improved focus detecting system
JPS6165671A (en) * 1984-09-07 1986-04-04 Matsushita Electric Ind Co Ltd Automatic focusing device
JPS6170867A (en) * 1984-09-14 1986-04-11 Matsushita Electric Ind Co Ltd Fluorescent light flicker detector
US4671640A (en) * 1984-08-09 1987-06-09 Minolta Camera Kabushiki Kaisha Automatic focus control camera
JPH0678207A (en) * 1993-04-05 1994-03-18 Matsushita Electric Ind Co Ltd Fluorescent lamp flicker detector
US7345706B2 (en) 2002-08-23 2008-03-18 Fuji Photo Optical Co., Ltd. Auto focus system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52126225A (en) * 1976-04-15 1977-10-22 Asahi Optical Co Ltd Automatic focusing unit control circuit for ignoring pseudoofocus position detection signal
US4091275A (en) * 1976-10-07 1978-05-23 Honeywell Inc. Automatic focus system with oscillation inhibit circuit
JPS54158226A (en) * 1978-04-25 1979-12-13 Polaroid Corp Method of automatically positioning lens and camera executing same
JPS55111925A (en) * 1979-02-20 1980-08-29 Ricoh Co Ltd Focusing point signal generator
JPS5732409A (en) * 1980-08-06 1982-02-22 Chinon Kk Focusing controller

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52126225A (en) * 1976-04-15 1977-10-22 Asahi Optical Co Ltd Automatic focusing unit control circuit for ignoring pseudoofocus position detection signal
US4091275A (en) * 1976-10-07 1978-05-23 Honeywell Inc. Automatic focus system with oscillation inhibit circuit
JPS54158226A (en) * 1978-04-25 1979-12-13 Polaroid Corp Method of automatically positioning lens and camera executing same
JPS55111925A (en) * 1979-02-20 1980-08-29 Ricoh Co Ltd Focusing point signal generator
JPS5732409A (en) * 1980-08-06 1982-02-22 Chinon Kk Focusing controller

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575212A (en) * 1982-12-28 1986-03-11 Minolta Camera Kabushiki Kaisha Camera with an improved focus detecting system
JPS59226307A (en) * 1983-05-18 1984-12-19 ハネウエル・インコ−ポレ−テツド Decision for focus position of automatic focusing apparatus
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
JPS6165671A (en) * 1984-09-07 1986-04-04 Matsushita Electric Ind Co Ltd Automatic focusing device
JPH0588594B2 (en) * 1984-09-07 1993-12-22 Matsushita Electric Ind Co Ltd
JPS6170867A (en) * 1984-09-14 1986-04-11 Matsushita Electric Ind Co Ltd Fluorescent light flicker detector
JPH0678207A (en) * 1993-04-05 1994-03-18 Matsushita Electric Ind Co Ltd Fluorescent lamp flicker detector
US7345706B2 (en) 2002-08-23 2008-03-18 Fuji Photo Optical Co., Ltd. Auto focus system

Also Published As

Publication number Publication date
JPS642922B2 (en) 1989-01-19

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