JPS5518652A - Imaging state detecting system of image - Google Patents

Imaging state detecting system of image

Info

Publication number
JPS5518652A
JPS5518652A JP9209978A JP9209978A JPS5518652A JP S5518652 A JPS5518652 A JP S5518652A JP 9209978 A JP9209978 A JP 9209978A JP 9209978 A JP9209978 A JP 9209978A JP S5518652 A JPS5518652 A JP S5518652A
Authority
JP
Japan
Prior art keywords
images
imaging state
circuit
image
scanning signals
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
JP9209978A
Other languages
Japanese (ja)
Inventor
Takao Kinoshita
Takashi Kawabata
Mitsuya Hosoe
Tokuichi Tsunekawa
Toshio Sakane
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 JP9209978A priority Critical patent/JPS5518652A/en
Priority to US06/059,635 priority patent/US4470676A/en
Priority to DE19792930636 priority patent/DE2930636A1/en
Priority to FR7919469A priority patent/FR2435055B1/en
Priority to GB7926516A priority patent/GB2030022B/en
Publication of JPS5518652A publication Critical patent/JPS5518652A/en
Priority to US06/727,194 priority patent/US4560864A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To surely detect the imaging state of images by comparing the scanning signals of the images formed by an image forming optical system and evaluating the imaging state from the differences in the illuminances of the proximate two positions of the images.
CONSTITUTION: The images formed by an image forming optical system 1 are scanned by a semiconductor image sensor 4 such as of BBD photo diode array or the like provided at the intended focal plane or in the position conjugate with said focal plane. At this time, the time-series scanning signals and the scanning signals scanned immediate before going through a delay circuit 7 are applied to a differential amplifier 8 whereby they are made to differential signals which are then held in a holding circuit 12 by way of an absolute value circuit 8, γ converting circuit 10 adding specified weights, integrating circuit 11, etc. and are displayed in a display meter 13. Hence, the illuminance differences of the proximate two positions of the images for the image state are evaluated by the meter 13 and the imaging state of the images may be detected surely.
COPYRIGHT: (C)1980,JPO&Japio
JP9209978A 1978-07-28 1978-07-28 Imaging state detecting system of image Pending JPS5518652A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP9209978A JPS5518652A (en) 1978-07-28 1978-07-28 Imaging state detecting system of image
US06/059,635 US4470676A (en) 1978-07-28 1979-07-23 Focus detecting device
DE19792930636 DE2930636A1 (en) 1978-07-28 1979-07-27 DEVICE FOR FOCUSING DETERMINATION
FR7919469A FR2435055B1 (en) 1978-07-28 1979-07-27 FIREPLACE DETECTION DEVICE
GB7926516A GB2030022B (en) 1978-07-28 1979-07-30 Focus detecting device
US06/727,194 US4560864A (en) 1978-07-28 1985-04-29 Focus detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9209978A JPS5518652A (en) 1978-07-28 1978-07-28 Imaging state detecting system of image

Related Child Applications (3)

Application Number Title Priority Date Filing Date
JP16697085A Division JPS6163813A (en) 1985-07-29 1985-07-29 Focusing state detector
JP16696885A Division JPS6163812A (en) 1985-07-29 1985-07-29 Focusing state detecting element structure of camera
JP16696985A Division JPS6163814A (en) 1985-07-29 1985-07-29 Focusing state detector of camera

Publications (1)

Publication Number Publication Date
JPS5518652A true JPS5518652A (en) 1980-02-08

Family

ID=14044991

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9209978A Pending JPS5518652A (en) 1978-07-28 1978-07-28 Imaging state detecting system of image

Country Status (1)

Country Link
JP (1) JPS5518652A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5734509A (en) * 1980-08-07 1982-02-24 Asahi Optical Co Ltd Automatic focusing detector of camera
JPS5737336A (en) * 1980-08-19 1982-03-01 Asahi Optical Co Ltd Automatic focus detector for camera
JPS5746233A (en) * 1980-09-04 1982-03-16 Asahi Optical Co Ltd Automatic focus detector of camera
JPS5764711A (en) * 1980-10-09 1982-04-20 Asahi Optical Co Ltd Automatic focus detector for camera
JPS5785013A (en) * 1980-11-17 1982-05-27 Kawasaki Heavy Ind Ltd Automatic focusing method
JPS5799604A (en) * 1980-12-12 1982-06-21 Canon Inc Focus detector
JPS57160221A (en) * 1981-03-28 1982-10-02 Olympus Optical Co Ltd Analog to digital conversion system
JPS59155809A (en) * 1983-02-24 1984-09-05 Olympus Optical Co Ltd Automatic focus detecting device
JPS6014211A (en) * 1983-07-06 1985-01-24 Olympus Optical Co Ltd Focusing detecting device
JPS6061714A (en) * 1983-09-14 1985-04-09 Olympus Optical Co Ltd Focusing detecting device
JPS62107067A (en) * 1985-10-31 1987-05-18 Kyocera Corp Diamond coated cutting tool
JPH04228839A (en) * 1990-05-24 1992-08-18 Hitachi Ltd Servo valve control device and its control method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5126030A (en) * 1974-08-28 1976-03-03 Minolta Camera Kk GOSHOTENKENSHUTSUSOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5126030A (en) * 1974-08-28 1976-03-03 Minolta Camera Kk GOSHOTENKENSHUTSUSOCHI

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0340365B2 (en) * 1980-08-07 1991-06-18
JPS5734509A (en) * 1980-08-07 1982-02-24 Asahi Optical Co Ltd Automatic focusing detector of camera
JPS6344205B2 (en) * 1980-08-19 1988-09-02 Asahi Optical Co Ltd
JPS5737336A (en) * 1980-08-19 1982-03-01 Asahi Optical Co Ltd Automatic focus detector for camera
JPS5746233A (en) * 1980-09-04 1982-03-16 Asahi Optical Co Ltd Automatic focus detector of camera
JPS5764711A (en) * 1980-10-09 1982-04-20 Asahi Optical Co Ltd Automatic focus detector for camera
JPH0340366B2 (en) * 1980-10-09 1991-06-18
JPS5785013A (en) * 1980-11-17 1982-05-27 Kawasaki Heavy Ind Ltd Automatic focusing method
JPS6345565B2 (en) * 1980-12-12 1988-09-09 Canon Kk
JPS5799604A (en) * 1980-12-12 1982-06-21 Canon Inc Focus detector
JPH0213493B2 (en) * 1981-03-28 1990-04-04 Olympus Optical Co
JPS57160221A (en) * 1981-03-28 1982-10-02 Olympus Optical Co Ltd Analog to digital conversion system
JPS59155809A (en) * 1983-02-24 1984-09-05 Olympus Optical Co Ltd Automatic focus detecting device
JPH0541965B2 (en) * 1983-02-24 1993-06-25 Olympus Optical Co
JPS6014211A (en) * 1983-07-06 1985-01-24 Olympus Optical Co Ltd Focusing detecting device
JPS6061714A (en) * 1983-09-14 1985-04-09 Olympus Optical Co Ltd Focusing detecting device
JPH0380284B2 (en) * 1983-09-14 1991-12-24 Olympus Optical Co
JPS62107067A (en) * 1985-10-31 1987-05-18 Kyocera Corp Diamond coated cutting tool
JPH04228839A (en) * 1990-05-24 1992-08-18 Hitachi Ltd Servo valve control device and its control method

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