Title:
A focus detecting device and a method
Document Type and Number:
Japanese Patent JP6080619
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enable accurate focus detection even when focusing on an ultra-bright object.SOLUTION: A focus detection device includes; a plurality of line sensors (102-1 through 11), each of which accumulates electrical charge obtained by photo-electrically converting an incident light flux from an object and generates a pair of image signals having parallax therebetween; setting means (103) for setting priority on the plurality of line sensors; characteristic value detection means (104, 105) which cycles through and monitors the plurality of line sensors on the basis of the priority set and detects a characteristic value signal of a pair of image signals generated by a line sensor being monitored; control means (106, 103) which provides control to halt charge accumulation by the line sensor being monitored if the detected characteristic value signal is greater than a predetermined accumulation halt level; and focus detection means (100) which detects focal condition using the image signals read from the plurality of line sensors.
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Inventors:
Takayuki Zhou
Application Number:
JP2013045907A
Publication Date:
February 15, 2017
Filing Date:
March 07, 2013
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B7/28; G02B7/34; G03B13/36; H04N5/232
Domestic Patent References:
| JP2002131624A | ||||
| JP2009294663A | ||||
| JP2006208802A |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu