JPS54161928A - Focus detector - Google Patents

Focus detector

Info

Publication number
JPS54161928A
JPS54161928A JP7113978A JP7113978A JPS54161928A JP S54161928 A JPS54161928 A JP S54161928A JP 7113978 A JP7113978 A JP 7113978A JP 7113978 A JP7113978 A JP 7113978A JP S54161928 A JPS54161928 A JP S54161928A
Authority
JP
Japan
Prior art keywords
array
optical system
scanning
signals
self
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
JP7113978A
Other languages
Japanese (ja)
Inventor
Nobuyuki Asano
Yukichi Niwa
Mitsutoshi Owada
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 JP7113978A priority Critical patent/JPS54161928A/en
Publication of JPS54161928A publication Critical patent/JPS54161928A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To eliminate the need for equal speed movement of lenses and make possible manual feeding and temporary stopping by using a self-scanning type photo sensor array.
CONSTITUTION: This is provided with an A/D converter 9 which fetches the object image formed on a self-scanning type photo sensor array 6 by an optical system 5 as time series signals through scanning of the array 6 and converts the respective outputs of the array to digital signals, arithmetic circuits 10, 11 which operate the differential signals between the respective adjoining outputs of the time series digital signals from the array 6, a circuit 12 which detects the maximum value of the adjoining output difference at each scanning of the array 6, a maximal value detecting circuit 13 which obtains the position of an optical system 5 becoming maximal of the maximum value by subsequently comparing the maximum values of detection at the position moving of the optical system and a focus display circuit 14 which displays the focus of the image by the detection output.
COPYRIGHT: (C)1979,JPO&Japio
JP7113978A 1978-06-12 1978-06-12 Focus detector Pending JPS54161928A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7113978A JPS54161928A (en) 1978-06-12 1978-06-12 Focus detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7113978A JPS54161928A (en) 1978-06-12 1978-06-12 Focus detector

Publications (1)

Publication Number Publication Date
JPS54161928A true JPS54161928A (en) 1979-12-22

Family

ID=13451945

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7113978A Pending JPS54161928A (en) 1978-06-12 1978-06-12 Focus detector

Country Status (1)

Country Link
JP (1) JPS54161928A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5785013A (en) * 1980-11-17 1982-05-27 Kawasaki Heavy Ind Ltd Automatic focusing method
JPS5858505A (en) * 1981-10-05 1983-04-07 Hitachi Ltd Auto-focus device for video camera
JPS59140409A (en) * 1983-07-06 1984-08-11 Minolta Camera Co Ltd Focus detecting device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5785013A (en) * 1980-11-17 1982-05-27 Kawasaki Heavy Ind Ltd Automatic focusing method
JPS5858505A (en) * 1981-10-05 1983-04-07 Hitachi Ltd Auto-focus device for video camera
JPH0115188B2 (en) * 1981-10-05 1989-03-16 Hitachi Ltd
JPS59140409A (en) * 1983-07-06 1984-08-11 Minolta Camera Co Ltd Focus detecting device

Similar Documents

Publication Publication Date Title
JPS5385453A (en) Distance detecting method
JPS5546172A (en) Detector for foreign material
JPS5315131A (en) Detecting method for sharpness of objective image
JPS5451556A (en) Distance measuring apparatus
JPS5632126A (en) Ttl type focus detector for lens interchangeable type camera
JPS57158820A (en) Method for focusing detection
JPS57161839A (en) Distance measuring device of camera
JPS57108810A (en) Focus detector
JPS5560903A (en) Focus detector
JPS5697325A (en) Focus detecting method of camera
JPS5518652A (en) Imaging state detecting system of image
JPS5371850A (en) Position detector
JPS54161928A (en) Focus detector
JPS55155331A (en) Focus detector
EP0280256A3 (en) Focus detection apparatus for camera
JPS55111924A (en) Focusing detector
JPS5564218A (en) Focus detector
JPS5244656A (en) Method of measuring camber of steel plates
JPS5242136A (en) Optical process for detecting seams
JPS55106442A (en) Blur detector
JPS5553304A (en) Focus detector
JPS55155311A (en) Imaging state detecting system of image
JPS5364531A (en) Photo detector using optical fiber
JPS5574505A (en) Focus position detecting system of image
JPS5576311A (en) Focus position detecting system of image