JPS57118206A - Display system of focusing detector - Google Patents

Display system of focusing detector

Info

Publication number
JPS57118206A
JPS57118206A JP435781A JP435781A JPS57118206A JP S57118206 A JPS57118206 A JP S57118206A JP 435781 A JP435781 A JP 435781A JP 435781 A JP435781 A JP 435781A JP S57118206 A JPS57118206 A JP S57118206A
Authority
JP
Japan
Prior art keywords
supplied
luminous intensity
comparators
object image
control circuit
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
JP435781A
Other languages
Japanese (ja)
Inventor
Shinji Sakai
Nobuhiko Shinoda
Takao Kinoshita
Mitsuya Hosoe
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 JP435781A priority Critical patent/JPS57118206A/en
Priority to DE19813141182 priority patent/DE3141182A1/en
Publication of JPS57118206A publication Critical patent/JPS57118206A/en
Priority to US06/767,668 priority patent/US4641942A/en
Pending 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
    • G02B7/38—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals measured at different points on the optical axis, e.g. focussing on two or more planes and comparing image data

Abstract

PURPOSE:To control the luminance of a display in the focusing settling state in accordance with the luminous intensity of an object image, by producing the signal corresponding to the luminous intensity of the object image on a solid- state image pickup element. CONSTITUTION:The electric charge transferred after being stored for a prescribed time in a photoelectric transducer CCD6 having three light receiving parts 6', 6'' and 6''' is supplied to a balance control circuit BA via a noise suppressing capacitor C and in the form of a picture signal. This picture signal supplied to a differential amplifier DIF to obtain the difference of the output signals of the 1st and 2nd sample holding circuits SHA and SHB. The output of the amplifier DIF is supplied to comparators COMPA and COMPB respectively, and the outputs of both comparators are supplied to a storing time control circuit AGC to secure a proper level for the dark current compensation signal. A display luminance modulating circuit MOD receives information A and B from the circuit AGC and then receives a pulse of a suitable frequency from a dynamic generator TMGE to decide the turn on/off periods for the diodes LEDA, LEDB and LEDC respectively.
JP435781A 1980-10-16 1981-01-14 Display system of focusing detector Pending JPS57118206A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP435781A JPS57118206A (en) 1981-01-14 1981-01-14 Display system of focusing detector
DE19813141182 DE3141182A1 (en) 1980-10-16 1981-10-16 "FOCUS DETECTING SYSTEM"
US06/767,668 US4641942A (en) 1980-10-16 1985-08-21 Focus detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP435781A JPS57118206A (en) 1981-01-14 1981-01-14 Display system of focusing detector

Publications (1)

Publication Number Publication Date
JPS57118206A true JPS57118206A (en) 1982-07-23

Family

ID=11582136

Family Applications (1)

Application Number Title Priority Date Filing Date
JP435781A Pending JPS57118206A (en) 1980-10-16 1981-01-14 Display system of focusing detector

Country Status (1)

Country Link
JP (1) JPS57118206A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0926540A (en) * 1996-03-25 1997-01-28 Minolta Co Ltd Automatic focusing device
JPH0990207A (en) * 1996-03-25 1997-04-04 Minolta Co Ltd Automatic focusing device
JPH0990211A (en) * 1996-03-25 1997-04-04 Minolta Co Ltd Automatic focusing device
JPH0990205A (en) * 1996-03-25 1997-04-04 Minolta Co Ltd Automatic focusing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0926540A (en) * 1996-03-25 1997-01-28 Minolta Co Ltd Automatic focusing device
JPH0990207A (en) * 1996-03-25 1997-04-04 Minolta Co Ltd Automatic focusing device
JPH0990211A (en) * 1996-03-25 1997-04-04 Minolta Co Ltd Automatic focusing device
JPH0990205A (en) * 1996-03-25 1997-04-04 Minolta Co Ltd Automatic focusing device

Similar Documents

Publication Publication Date Title
CA2130337A1 (en) Method and Apparatus for Dynamic Correction of Microscopic Image Signals
EP0400606A3 (en) Automatic white balance control circuit
ATE20294T1 (en) CAMERAS WITH CHARGE COUPLED DEVICE.
JPS54140543A (en) Monitor for zerographic apparatus
JPS5611348A (en) Gradation processing method of radiation picture
JPS6156915B2 (en)
JPH0758226B2 (en) Light source detection device
JPS5739673A (en) Image sensor
JPS5781775A (en) Image pickup equipment
JPS57118206A (en) Display system of focusing detector
US4255028A (en) Focus detecting device in camera
CA2034223A1 (en) Image data processing apparatus
JPS6460156A (en) Method for controlling image pickup device
US4302780A (en) Photometric system
JPS63308484A (en) Solid-state image pickup device
GB2021894A (en) Monocular range-finders
JP3090164B2 (en) Electronic endoscope device
JPS57142080A (en) Output level adjusting method for ccd image sensor
JPS5717273A (en) Multiple exposure device for electronic camera
JPS56131258A (en) Photoelectric converter
JPS57212877A (en) Pickup device
JPS5561175A (en) Automatic sensitivity adjusting circuit for television camera
JPS54124629A (en) Video signal processing circuit in image pickup unit using ccd image sensor
GB1397359A (en) Television apparatus
SU1284002A1 (en) Television camera based on photosensitive charge-coupled device