JPS5788417A - Automatic focusing system - Google Patents

Automatic focusing system

Info

Publication number
JPS5788417A
JPS5788417A JP55163340A JP16334080A JPS5788417A JP S5788417 A JPS5788417 A JP S5788417A JP 55163340 A JP55163340 A JP 55163340A JP 16334080 A JP16334080 A JP 16334080A JP S5788417 A JPS5788417 A JP S5788417A
Authority
JP
Japan
Prior art keywords
pickup element
image pickup
subimage
lens
photographed
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
JP55163340A
Other languages
Japanese (ja)
Inventor
Manabu Yamamoto
Shuhei Tanaka
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.)
Kokusai Denki Electric Inc
Original Assignee
Hitachi Denshi 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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP55163340A priority Critical patent/JPS5788417A/en
Priority to US06/322,704 priority patent/US4414575A/en
Priority to GB8134931A priority patent/GB2090498A/en
Priority to FR8121797A priority patent/FR2494858A1/en
Priority to DE19813146387 priority patent/DE3146387A1/en
Publication of JPS5788417A publication Critical patent/JPS5788417A/en
Pending 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)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To obtain focusing with high accuracy, by using image definition signals obtained from a main image pickup element and a subimage pickup element, as logical inputs, and controlling a lens position by an output obtained by executing a specific logical operation processing to said inputs. CONSTITUTION:An image pickup element 21 which forms an image of an object to be photographed, on the image pickup element 21 by an image pickup lens 11, and also is projected on two image pickup elements 31, 41, too, through a beam splitter 12 is a main image pickup element, and also a part of a two- dimensional video signal generated from said element is utilized as an automatic focusing signal, too. When an object to be photographed has been correctly focused on the main image pickup element 21, the subimage pickup element 31 and the subimage pickup element 41 are placed at the front pin which is nearer the lens 11 than said element, and at the rear pin which is farther from the lens 11 than it, respectively, and when the main image pickup element 21 scans a specific horizontal scanning line, the subimage pickup elements 31, 41 are also scanned by synchronizing with said scanning, and three video signals obtained in that case are adjusted so as to correspond to the same part of the object to be photographed.
JP55163340A 1980-11-21 1980-11-21 Automatic focusing system Pending JPS5788417A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP55163340A JPS5788417A (en) 1980-11-21 1980-11-21 Automatic focusing system
US06/322,704 US4414575A (en) 1980-11-21 1981-11-18 Autofocus system
GB8134931A GB2090498A (en) 1980-11-21 1981-11-19 Autofocus system
FR8121797A FR2494858A1 (en) 1980-11-21 1981-11-20 AUTOMATIC FOCUSING SYSTEM, ESPECIALLY FOR TELEVISION CAMERA
DE19813146387 DE3146387A1 (en) 1980-11-21 1981-11-23 AUTOFOCUS SYSTEM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55163340A JPS5788417A (en) 1980-11-21 1980-11-21 Automatic focusing system

Publications (1)

Publication Number Publication Date
JPS5788417A true JPS5788417A (en) 1982-06-02

Family

ID=15772000

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55163340A Pending JPS5788417A (en) 1980-11-21 1980-11-21 Automatic focusing system

Country Status (1)

Country Link
JP (1) JPS5788417A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103826064A (en) * 2014-03-06 2014-05-28 华为技术有限公司 Image processing method, device and handheld electronic equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51147336A (en) * 1975-06-13 1976-12-17 Hitachi Ltd Auto-focus adjustment appliance for microscope
JPS5461922A (en) * 1977-10-26 1979-05-18 Toshihiko Kotsukawa Automatic focusing controller
JPS5557809A (en) * 1978-10-24 1980-04-30 Olympus Optical Co Ltd Focusing detection system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51147336A (en) * 1975-06-13 1976-12-17 Hitachi Ltd Auto-focus adjustment appliance for microscope
JPS5461922A (en) * 1977-10-26 1979-05-18 Toshihiko Kotsukawa Automatic focusing controller
JPS5557809A (en) * 1978-10-24 1980-04-30 Olympus Optical Co Ltd Focusing detection system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103826064A (en) * 2014-03-06 2014-05-28 华为技术有限公司 Image processing method, device and handheld electronic equipment

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