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Title:
OPTICAL IMAGE FORMING SYSTEM AND ELECTRONIC IMAGING DEVICE HAVING THE SAME
Document Type and Number:
WIPO Patent Application WO/2009/157234
Kind Code:
A1
Abstract:
In an optical image forming system, a positive lens group is arranged on the object side of the diaphragm. The θgF1, etc. of at least one lens (LA) which constitutes the positive lens group lies in three regions. The three regions are a region defined by a straight line as the lower limit and a straight line as the higher limit of the range of a first condition expression when a straight line expressed by θgF1=α1 x νd1 + βgF1 (wherein α1=-0.00566) is set, a region defined by a straight line as the lower limit and a straight line as the higher limit of the range of a second condition expression when a straight line expressed by nd1=a1 x νd1 + b1 (wherein a1=-0.0267) is set, and a region defined by a third condition expression.

More Like This:
JPH07253533INNER FOCUS TYPE OBJECTIVE LENS
JP3234618LARGE-APERTURE INTERMEDIATE TELEPHOTO LENS
Inventors:
MIHARA SHINICHI (JP)
ADACHI KANATO (JP)
Application Number:
PCT/JP2009/055755
Publication Date:
December 30, 2009
Filing Date:
March 24, 2009
Export Citation:
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Assignee:
OLYMPUS IMAGING CORP (JP)
MIHARA SHINICHI (JP)
ADACHI KANATO (JP)
International Classes:
G02B13/02; G02B15/20; G02B13/18
Foreign References:
JP2007322986A2007-12-13
JP2008139645A2008-06-19
JP2005352265A2005-12-22
JP2008203304A2008-09-04
JPH08248317A1996-09-27
JP2003241091A2003-08-27
JP2008129460A2008-06-05
JPH05196865A1993-08-06
JP2006003544A2006-01-05
JP2005181392A2005-07-07
JP2009047986A2009-03-05
JP2009047982A2009-03-05
JP2008233164A2008-10-02
JP2008233161A2008-10-02
JP2008191306A2008-08-21
JP2008191301A2008-08-21
JP2008191291A2008-08-21
JP2008191286A2008-08-21
Attorney, Agent or Firm:
SAITO, KEISUKE (JP)
Keisuke Saito (JP)
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