JPS5858505A - ビデオカメラのオ−トフオ−カス装置 - Google Patents

ビデオカメラのオ−トフオ−カス装置

Info

Publication number
JPS5858505A
JPS5858505A JP56157493A JP15749381A JPS5858505A JP S5858505 A JPS5858505 A JP S5858505A JP 56157493 A JP56157493 A JP 56157493A JP 15749381 A JP15749381 A JP 15749381A JP S5858505 A JPS5858505 A JP S5858505A
Authority
JP
Japan
Prior art keywords
circuit
helicoid
voltage
focus
value
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
JP56157493A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0115188B2 (enrdf_load_stackoverflow
Inventor
Kentaro Hanma
謙太郎 半間
Yoshiyuki Kono
幸野　善之
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56157493A priority Critical patent/JPS5858505A/ja
Publication of JPS5858505A publication Critical patent/JPS5858505A/ja
Publication of JPH0115188B2 publication Critical patent/JPH0115188B2/ja
Granted 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)
  • Automatic Focus Adjustment (AREA)
JP56157493A 1981-10-05 1981-10-05 ビデオカメラのオ−トフオ−カス装置 Granted JPS5858505A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56157493A JPS5858505A (ja) 1981-10-05 1981-10-05 ビデオカメラのオ−トフオ−カス装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56157493A JPS5858505A (ja) 1981-10-05 1981-10-05 ビデオカメラのオ−トフオ−カス装置

Publications (2)

Publication Number Publication Date
JPS5858505A true JPS5858505A (ja) 1983-04-07
JPH0115188B2 JPH0115188B2 (enrdf_load_stackoverflow) 1989-03-16

Family

ID=15650887

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56157493A Granted JPS5858505A (ja) 1981-10-05 1981-10-05 ビデオカメラのオ−トフオ−カス装置

Country Status (1)

Country Link
JP (1) JPS5858505A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4841370A (en) * 1986-11-17 1989-06-20 Sanyo Electric Co., Ltd. Automatic focusing circuit for automatically matching focus in response to video signal
US4853789A (en) * 1987-02-18 1989-08-01 Sanyo Electric Co., Ltd. Automatic focusing circuit using a two period detection interval to compensate for motion occurring within a field of view
US5055933A (en) * 1989-11-22 1991-10-08 Sanyo Electric Co., Ltd. Automatic focusing apparatus and automatic focusing method for automatically matching focus in response to video signal
US5319462A (en) * 1990-02-28 1994-06-07 Sanyo Electric Co., Ltd. Automatic focusing apparatus for automatically adjusting focus in response to video signal by fuzzy inference
US5404013A (en) * 1993-02-25 1995-04-04 Fujitsu Limited Infrared imaging system having an automatic focusing control

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007310004A (ja) 2006-05-16 2007-11-29 Citizen Holdings Co Ltd 自動合焦点装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852231A (enrdf_load_stackoverflow) * 1971-11-01 1973-07-23
JPS52137330A (en) * 1976-05-13 1977-11-16 Olympus Optical Co Ltd Device for holding peak value
JPS54161928A (en) * 1978-06-12 1979-12-22 Canon Inc Focus detector
JPS55111929A (en) * 1979-02-21 1980-08-29 Ricoh Co Ltd Automatic focusing device
JPS5651164A (en) * 1979-10-03 1981-05-08 Hitachi Ltd Automatic focusing device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852231A (enrdf_load_stackoverflow) * 1971-11-01 1973-07-23
JPS52137330A (en) * 1976-05-13 1977-11-16 Olympus Optical Co Ltd Device for holding peak value
JPS54161928A (en) * 1978-06-12 1979-12-22 Canon Inc Focus detector
JPS55111929A (en) * 1979-02-21 1980-08-29 Ricoh Co Ltd Automatic focusing device
JPS5651164A (en) * 1979-10-03 1981-05-08 Hitachi Ltd Automatic focusing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4841370A (en) * 1986-11-17 1989-06-20 Sanyo Electric Co., Ltd. Automatic focusing circuit for automatically matching focus in response to video signal
US4853789A (en) * 1987-02-18 1989-08-01 Sanyo Electric Co., Ltd. Automatic focusing circuit using a two period detection interval to compensate for motion occurring within a field of view
US5055933A (en) * 1989-11-22 1991-10-08 Sanyo Electric Co., Ltd. Automatic focusing apparatus and automatic focusing method for automatically matching focus in response to video signal
US5319462A (en) * 1990-02-28 1994-06-07 Sanyo Electric Co., Ltd. Automatic focusing apparatus for automatically adjusting focus in response to video signal by fuzzy inference
US5404013A (en) * 1993-02-25 1995-04-04 Fujitsu Limited Infrared imaging system having an automatic focusing control

Also Published As

Publication number Publication date
JPH0115188B2 (enrdf_load_stackoverflow) 1989-03-16

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