JPS6477009A - Distance detection device using focus detection device - Google Patents

Distance detection device using focus detection device

Info

Publication number
JPS6477009A
JPS6477009A JP20669788A JP20669788A JPS6477009A JP S6477009 A JPS6477009 A JP S6477009A JP 20669788 A JP20669788 A JP 20669788A JP 20669788 A JP20669788 A JP 20669788A JP S6477009 A JPS6477009 A JP S6477009A
Authority
JP
Japan
Prior art keywords
detection device
distance
focus
photographic lens
defocusing
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.)
Granted
Application number
JP20669788A
Other languages
Japanese (ja)
Other versions
JP2671421B2 (en
Inventor
Tokuji Ishida
Toshio Norida
Hiroshi Otsuka
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 JP63206697A priority Critical patent/JP2671421B2/en
Publication of JPS6477009A publication Critical patent/JPS6477009A/en
Application granted granted Critical
Publication of JP2671421B2 publication Critical patent/JP2671421B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Measurement Of Optical Distance (AREA)
  • Focusing (AREA)

Abstract

PURPOSE:To detect an object distance even if a focus is not brought into an object by obtaining the extension quantity of a photographic lens from the position of infinity to the position of an object based on the extension quantity of the photographic lens from the position of infinity to the current position and the defocusing quantity to the object. CONSTITUTION:The extension quantity N of the photographic lens 11 from the position of infinity to the current position is detected and also the focusing state of the photographic lens 11 is detected so as to calculate the defocusing quantity DF to the object. And the distance (x) is calculated based on the extension quantity N and the defocusing quantity DF calculated in a defocusing quantity calculation means 2. Thus, the object distance (x) can be obtained even if the focus of the photographing lens 11 is not brought into the object.
JP63206697A 1988-08-20 1988-08-20 Distance detection device using focus detection device Expired - Lifetime JP2671421B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63206697A JP2671421B2 (en) 1988-08-20 1988-08-20 Distance detection device using focus detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63206697A JP2671421B2 (en) 1988-08-20 1988-08-20 Distance detection device using focus detection device

Publications (2)

Publication Number Publication Date
JPS6477009A true JPS6477009A (en) 1989-03-23
JP2671421B2 JP2671421B2 (en) 1997-10-29

Family

ID=16527618

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63206697A Expired - Lifetime JP2671421B2 (en) 1988-08-20 1988-08-20 Distance detection device using focus detection device

Country Status (1)

Country Link
JP (1) JP2671421B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006113391A (en) * 2004-10-15 2006-04-27 Nikon Corp Camera

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58150921A (en) * 1982-03-04 1983-09-07 Nippon Kogaku Kk <Nikon> Information detector of automatic focusing camera

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58150921A (en) * 1982-03-04 1983-09-07 Nippon Kogaku Kk <Nikon> Information detector of automatic focusing camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006113391A (en) * 2004-10-15 2006-04-27 Nikon Corp Camera

Also Published As

Publication number Publication date
JP2671421B2 (en) 1997-10-29

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term