JPS561925A - Automatic focus adjuster - Google Patents

Automatic focus adjuster

Info

Publication number
JPS561925A
JPS561925A JP7771579A JP7771579A JPS561925A JP S561925 A JPS561925 A JP S561925A JP 7771579 A JP7771579 A JP 7771579A JP 7771579 A JP7771579 A JP 7771579A JP S561925 A JPS561925 A JP S561925A
Authority
JP
Japan
Prior art keywords
level
scanning
memory capacitor
stored value
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.)
Pending
Application number
JP7771579A
Other languages
Japanese (ja)
Inventor
Kunio Kawamura
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.)
Minolta Co Ltd
Original Assignee
Minolta Co 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP7771579A priority Critical patent/JPS561925A/en
Publication of JPS561925A publication Critical patent/JPS561925A/en
Pending legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE: To obtain the automatic focus adjuster of less erroneous operations by storing the maximum signal value for the focusing position through focus search scanning and shifting down the stored value at a fixed rate through the detection scanning in succession to search scanning.
CONSTITUTION: The maximum value of the 1st correlation signal is charged in a memory capacitor 60 to make a stored value. At this time, the level on the reference terminal side of the memory capacitor 60 has been raised by the level X of a voltage dividing point 70. When the focus search scanning ends and the detection scanning is started, a change-over switch 72 is closd to short-circuit a resistance 68, thereby shifting down the charging reference level of the memory capacitor 60 from X down to the ground level. Owing to this, the stored value of the memory capacitor 60 is instantly lowered by the level X of the raised portion. Since the stored value 88 which is shifted down by a fixed rate X at the start of the detection scanning coincides with the 2nd correlation signal 84, the accurate focus determination signal may be obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP7771579A 1979-06-19 1979-06-19 Automatic focus adjuster Pending JPS561925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7771579A JPS561925A (en) 1979-06-19 1979-06-19 Automatic focus adjuster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7771579A JPS561925A (en) 1979-06-19 1979-06-19 Automatic focus adjuster

Publications (1)

Publication Number Publication Date
JPS561925A true JPS561925A (en) 1981-01-10

Family

ID=13641576

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7771579A Pending JPS561925A (en) 1979-06-19 1979-06-19 Automatic focus adjuster

Country Status (1)

Country Link
JP (1) JPS561925A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01150508A (en) * 1987-12-09 1989-06-13 Taiheiyo Kiko Kk Washing method for concrete mixer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01150508A (en) * 1987-12-09 1989-06-13 Taiheiyo Kiko Kk Washing method for concrete mixer

Similar Documents

Publication Publication Date Title
JPS5678811A (en) Automatic focus controlling device
JPS561925A (en) Automatic focus adjuster
JPS5675608A (en) Automatic focus control device and automatic focus detecting device
JPS5529878A (en) Focus detector of camera
JPS5418663A (en) Gate control unit for thyristor valve
JPS52149020A (en) Facsimile capable of automatic recording of transmission/reception discrimination information
JPS5456717A (en) Solid state pickup device
JPS5738402A (en) Display device of automatic focal point adjuster
JPS5499517A (en) Automatic switch circuit of lens iris
JPS55100788A (en) Defect inspection unit
JPS52153454A (en) Automatic focus controlling apparatus
JPS5753735A (en) Mode switching device of camera
JPS5545280A (en) Auto-search tuning circuit
JPS5354411A (en) Solid pickup device
JPS5440649A (en) Automatic focal point locating device for microscope
JPS54120501A (en) Automatic channel selector
JPS54132747A (en) Protective relay
SU470017A1 (en) Method of converting optical signal into electrical
JPS54135550A (en) Automatic discrimination level adjusting circuit of photo signal receiving circuit
JPS55127609A (en) Controller for internal combustion engine
JPS5458068A (en) Digital indicator of maximum and minimum of transient phenomena
JPS5694507A (en) Tape recorder
JPS5799268A (en) No contact type ignition device
JPS53124913A (en) Noise erasing circuit
JPS5432931A (en) Reader