Title:
IMAGING DEVICE AND OPTICAL DEVICE PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2017/068726
Kind Code:
A1
Abstract:
An imaging device that is characterized by having: an optical system that has a plurality of lenses; and an imaging element that is arranged at an image position of the optical system. The imaging device is also characterized in that the optical system has, in order from an object side: a first lens L1 that has negative refractive power; a second lens L2 that has positive refractive power; an aperture stop S; and a third lens L3. The imaging device is also characterized in that the first lens L1, the second lens L2, and the third lens L3 are formed from a material that has a refractive index of 1.70 or lower. The imaging device is also characterized by satisfying conditional expressions (1) and (2). (1) 2.0 <Σd/FL < 5.5. (2) 0.5 <Φ1L/IH < 3.0.
Inventors:
TAKADA KEISUKE (JP)
UCHIDA YOSHIHIRO (JP)
UCHIDA YOSHIHIRO (JP)
Application Number:
PCT/JP2015/080001
Publication Date:
April 27, 2017
Filing Date:
October 23, 2015
Export Citation:
Assignee:
OLYMPUS CORP (JP)
International Classes:
G02B13/04; G02B13/18
Domestic Patent References:
| WO2011027622A1 | 2011-03-10 |
Foreign References:
| JPH05107470A | 1993-04-30 | |||
| JPH10170821A | 1998-06-26 | |||
| JPH10239594A | 1998-09-11 | |||
| JPH11271607A | 1999-10-08 | |||
| JP2000187155A | 2000-07-04 | |||
| JP2004337346A | 2004-12-02 | |||
| JP2007011237A | 2007-01-18 | |||
| JP2011237750A | 2011-11-24 | |||
| JP2010107815A | 2010-05-13 | |||
| JP2010246906A | 2010-11-04 | |||
| JP2009136387A | 2009-06-25 |
Attorney, Agent or Firm:
SAITO Keisuke et al. (JP)
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