Title:
撮像レンズ、撮像装置及び携帯端末
Document Type and Number:
Japanese Patent JP4858648
Kind Code:
B2
Abstract:
Provided is a small-sized five-element image pickup lens which ensures a sufficient lens speed of about F2 and exhibits various aberrations being excellently corrected. The image pickup lens is composed of, in order from the object side, a first lens with a positive refractive power, including a convex surface facing the object side; a second lens with a negative refractive power, including a concave surface facing the image side; a third lens with a positive or negative refractive power, a fourth lens with a positive refractive power, including a convex surface facing the image side; and a fifth lens with a negative refractive power, including a concave surface facing the image side. The image-side surface of the fifth lens has an aspheric shape, and includes an inflection point at a position excluding an intersection point with the optical axis.
The image pickup lens satisfies the following conditional expression:
1.5 < |f3|/f < 20.0
where f3 is a focal length of the third lens, and
f is a focal length of a total system of the image pickup lens.
Inventors:
Eigo Sano
Yuichi Ozaki
Yuichi Ozaki
Application Number:
JP2010526682A
Publication Date:
January 18, 2012
Filing Date:
August 21, 2009
Export Citation:
Assignee:
Konica Minolta Opto Co., Ltd.
International Classes:
G02B13/00; G02B13/18
Domestic Patent References:
| JP2007298572A | 2007-11-15 | |||
| JPH07120671A | 1995-05-12 |
Attorney, Agent or Firm:
Mitsuhiro Fukuda