Title:
IMAGING LENS, IMAGING DEVICE AND MOBILE TERMINAL
Document Type and Number:
WIPO Patent Application WO/2011/132378
Kind Code:
A1
Abstract:
Disclosed is an imaging lens assembly comprising four individual lenses. The imaging lens assembly is small, has a wide viewing angle, and enables excellent correction of various aberrations. The imaging lens assembly includes, in order from the object side, an aperture stop, a first lens, a second lens, a third lens, and a fourth lens. The first lens has positive refractive power and a convex face directed toward the image side. The second lens has negative refractive power and a concave face directed toward the image side. The third lens has positive refractive power and a convex face directed toward the image side. The fourth lens has at least one non-spherical face, has negative refractive power, and has a biconcave shape. In addition, in the imaging lens assembly, if the paraxial curvature radius of the object-side face of the first lens is r1 and the focal distance of the entire imaging lens assembly is f, the imaging lens assembly is formed so as to satisfy the conditions of 1.15<|r1/f|<4.50.
Inventors:
NISHIDA MAIKO (JP)
Application Number:
PCT/JP2011/002122
Publication Date:
October 27, 2011
Filing Date:
April 11, 2011
Export Citation:
Assignee:
KONICA MINOLTA OPTO INC (JP)
NISHIDA MAIKO (JP)
NISHIDA MAIKO (JP)
International Classes:
G02B13/00; G02B13/18
Domestic Patent References:
| WO2005047951A1 | 2005-05-26 |
Foreign References:
| JP2009258286A | 2009-11-05 |
Attorney, Agent or Firm:
MISAWA PATENT OFFICE, p. c. (JP)
Patent business corporation Misawa patent firm (JP)
Patent business corporation Misawa patent firm (JP)
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