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JPS6448050A - Automatic focusing device - Google Patents

Automatic focusing device

Info

Publication number
JPS6448050A
JPS6448050A JP20461387A JP20461387A JPS6448050A JP S6448050 A JPS6448050 A JP S6448050A JP 20461387 A JP20461387 A JP 20461387A JP 20461387 A JP20461387 A JP 20461387A JP S6448050 A JPS6448050 A JP S6448050A
Authority
JP
Japan
Prior art keywords
range
mpu
finding
central part
focusing
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
JP20461387A
Other languages
Japanese (ja)
Inventor
Kazuki Konishi
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 JP20461387A priority Critical patent/JPS6448050A/en
Publication of JPS6448050A publication Critical patent/JPS6448050A/en
Priority to US08/072,860 priority patent/US5313245A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To prevent focusing the nearest peripheral object and to evade soft focusing in a central part by making the range-finding information of the central part in which the existence probability of a main object is high important. CONSTITUTION:When a signal is given to a light emission control circuit 2 from an MPU 6, light projecting elements 1a-1c in the circuit 2 are sequentially lighted and the output light from the light projecting element is reflected on the object so as to form a real image on the surface of a photodetector 3. According to the output from the photodetector 3, a range-finding circuit 4 sequentially operates distance to the object corresponding to respective range- finding points in a image plane. The range-finding information is read in the MPU 6 so as to compute the focusing position and then a photographic lens unit 8 is moved to a specified position. The MPU 6 decides the object which positions this side as the main object among the objects in the peripheral part and the object in the central part.
JP20461387A 1987-04-24 1987-08-18 Automatic focusing device Pending JPS6448050A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP20461387A JPS6448050A (en) 1987-08-18 1987-08-18 Automatic focusing device
US08/072,860 US5313245A (en) 1987-04-24 1993-06-07 Automatic focusing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20461387A JPS6448050A (en) 1987-08-18 1987-08-18 Automatic focusing device

Publications (1)

Publication Number Publication Date
JPS6448050A true JPS6448050A (en) 1989-02-22

Family

ID=16493376

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20461387A Pending JPS6448050A (en) 1987-04-24 1987-08-18 Automatic focusing device

Country Status (1)

Country Link
JP (1) JPS6448050A (en)

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