JPS6471382A - Automatic focusing device - Google Patents

Automatic focusing device

Info

Publication number
JPS6471382A
JPS6471382A JP62228147A JP22814787A JPS6471382A JP S6471382 A JPS6471382 A JP S6471382A JP 62228147 A JP62228147 A JP 62228147A JP 22814787 A JP22814787 A JP 22814787A JP S6471382 A JPS6471382 A JP S6471382A
Authority
JP
Japan
Prior art keywords
circuit
gate
video signal
pulse
gate pulse
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
JP62228147A
Other languages
Japanese (ja)
Other versions
JP2663451B2 (en
Inventor
Hiroshi Suda
Masamichi Toyama
Akihiro Fujiwara
Kunihiko Yamada
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
Priority to JP62228147A priority Critical patent/JP2663451B2/en
Application filed by Canon Inc filed Critical Canon Inc
Priority to DE3844877A priority patent/DE3844877C2/en
Priority to GB8821241A priority patent/GB2209901B/en
Priority to DE3844876A priority patent/DE3844876C2/en
Priority to DE3830794A priority patent/DE3830794C2/en
Publication of JPS6471382A publication Critical patent/JPS6471382A/en
Priority to US07/634,329 priority patent/US5128768A/en
Priority to US08/823,607 priority patent/US6088060A/en
Application granted granted Critical
Publication of JP2663451B2 publication Critical patent/JP2663451B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To continuously focus a main object, by moving a focus detecting area an object position on a photographing screen. CONSTITUTION:When a video signal is inputted from an image pickup element 2 to a gate circuit 11, the circuit 11 obtains the video signal in a designated area in one field conforming to a gate pulse from a gate pulse generator 55. A selector 48 detects position information corresponding to the information instructed by a maximum value detecting circuit 46, and outputs it to an FF 49. The pulse information is also sent to a gate pulse generating circuit 54. A gate circuit 10 makes the pulse information pass through the designated are in one field conforming to the gate pulse from the circuit 54, a detecting circuit 7 detects the video signal, holds the peak value of the absolute value signal of a luminance component in the area, and the motor driving circuit 8 drives a motor 9 in accordance with the peak value. Thus, a lens 1 is automatically controlled to a focusing condition.
JP62228147A 1987-09-11 1987-09-11 Automatic focusing device Expired - Fee Related JP2663451B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP62228147A JP2663451B2 (en) 1987-09-11 1987-09-11 Automatic focusing device
GB8821241A GB2209901B (en) 1987-09-11 1988-09-09 Image sensing device
DE3844876A DE3844876C2 (en) 1987-09-11 1988-09-09 Device for automatic tracking of a measuring range
DE3830794A DE3830794C2 (en) 1987-09-11 1988-09-09 Automatic focusing device
DE3844877A DE3844877C2 (en) 1987-09-11 1988-09-09 Device for automatic adjustment of the measuring range size
US07/634,329 US5128768A (en) 1987-09-11 1990-12-26 Automatic focusing device having a settable focus detection area
US08/823,607 US6088060A (en) 1987-09-11 1997-03-25 Automatic focusing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62228147A JP2663451B2 (en) 1987-09-11 1987-09-11 Automatic focusing device

Publications (2)

Publication Number Publication Date
JPS6471382A true JPS6471382A (en) 1989-03-16
JP2663451B2 JP2663451B2 (en) 1997-10-15

Family

ID=16871965

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62228147A Expired - Fee Related JP2663451B2 (en) 1987-09-11 1987-09-11 Automatic focusing device

Country Status (1)

Country Link
JP (1) JP2663451B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454354A3 (en) * 1990-04-19 1992-07-01 Mitsubishi Denki Kabushiki Kaisha Photographic optical system controlling apparatus
JPH06253200A (en) * 1993-02-25 1994-09-09 Fujitsu Ltd Infrared camera automatic focus adjustment method
JP2006129272A (en) * 2004-10-29 2006-05-18 Olympus Corp Camera, tracking apparatus, tracking method, and tracking program
JP2007011054A (en) * 2005-06-30 2007-01-18 Canon Inc IMAGING DEVICE, IMAGING DEVICE CONTROL METHOD, AND COMPUTER PROGRAM
JP2007225808A (en) * 2006-02-22 2007-09-06 Pentax Corp Autofocus unit and digital camera
US7660518B2 (en) 2005-07-21 2010-02-09 Fujinon Corporation Automatic focusing apparatus
JP2021173803A (en) * 2020-04-21 2021-11-01 キヤノン株式会社 Imaging device and its control method, program, storage medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60256113A (en) * 1984-05-31 1985-12-17 Canon Inc Automatic tracking device in camera

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60256113A (en) * 1984-05-31 1985-12-17 Canon Inc Automatic tracking device in camera

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454354A3 (en) * 1990-04-19 1992-07-01 Mitsubishi Denki Kabushiki Kaisha Photographic optical system controlling apparatus
JPH06253200A (en) * 1993-02-25 1994-09-09 Fujitsu Ltd Infrared camera automatic focus adjustment method
JP2006129272A (en) * 2004-10-29 2006-05-18 Olympus Corp Camera, tracking apparatus, tracking method, and tracking program
JP2007011054A (en) * 2005-06-30 2007-01-18 Canon Inc IMAGING DEVICE, IMAGING DEVICE CONTROL METHOD, AND COMPUTER PROGRAM
US7660518B2 (en) 2005-07-21 2010-02-09 Fujinon Corporation Automatic focusing apparatus
JP2007225808A (en) * 2006-02-22 2007-09-06 Pentax Corp Autofocus unit and digital camera
JP2021173803A (en) * 2020-04-21 2021-11-01 キヤノン株式会社 Imaging device and its control method, program, storage medium

Also Published As

Publication number Publication date
JP2663451B2 (en) 1997-10-15

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees