Title:
AUTO-FOCUS DEVICE AND METHOD FOR CONTROLLING OPERATION OF SAME
Document Type and Number:
WIPO Patent Application WO/2014/196389
Kind Code:
A1
Abstract:
This invention provides an auto-focus device for eliminating the sense of oddness when a switch is made from phase difference AF to light path length difference AF when an arbitrary range is set as a focusing subject range. A cameraman sets the desired range as the focusing subject range. Until a focus lens reaches a first threshold value position (P20), the focus lens (2) is moved using a phase difference AF evaluation value obtained from a phase difference AF sensor so that the center portion of the imaging range is focused. Until the focus lens reaches a second threshold value position (P30), the focus lens (2) is moved using a phase difference AF evaluation value outputted from a phase difference imaging element and obtained from a signal in a range corresponding to the set focusing subject range. When the focus lens reaches a second threshold value position (P30), the focus lens (2) is positioned at the focusing position using, of the differential AF evaluation values obtained from a light path length difference AF sensor, the differential AF evaluation value obtained on the basis of the set focusing subject range.
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Inventors:
EBATO TAKASHI (JP)
SATO TAKAHISA (JP)
SEKIYA AIKO (JP)
SATO TAKAHISA (JP)
SEKIYA AIKO (JP)
Application Number:
PCT/JP2014/063775
Publication Date:
December 11, 2014
Filing Date:
May 26, 2014
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B7/28; G02B7/34; G02B7/36; G02B7/38; G03B13/36; H04N5/232
Foreign References:
| JP2009251342A | 2009-10-29 | |||
| JP2010243843A | 2010-10-28 | |||
| JP2009003191A | 2009-01-08 |
Attorney, Agent or Firm:
PATENT PROFESSIONAL CORPORATION TOKYO UIT INTERNATIONAL (JP)
Tokyo UIT international patent business corporation (JP)
Tokyo UIT international patent business corporation (JP)
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