Image pickup lens and image pickup apparatus

Details Image pickup lens and image pickup apparatus Image pickup lens and image pickup apparatus

2011-08-09

2011-08-09

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

Reexamination Certificate

active

07995292

ABSTRACT:
An image pickup lens includes, in order from an object side, a first lens element having a positive refractive power and a convex surface facing the object side, an aperture stop adjusting the amount of light, a second lens element having a negative refractive power, a third lens element having a positive refractive power and a concave surface facing the object side, and a fourth lens element having a negative refractive power. In the image pickup lens, the following conditional expressions are satisfied,in-line-formulae description="In-line Formulae" end="lead"?0.6<|f2/f|<1.8in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0≦f2/R4<1.7in-line-formulae description="In-line Formulae" end="tail"?where f denotes a focal length of an entire lens system, f2denotes a focal length of the second lens element, and R4denotes a curvature radius of an object-side surface of the second lens element.

REFERENCES:
patent: 7561347 (2009-07-01), Park et al.
patent: 2008/0043343 (2008-02-01), Chen et al.
patent: 1 804 101 (2007-07-01), None
patent: 1 898 244 (2008-03-01), None
patent: 1 909 130 (2008-04-01), None
patent: 2005-292559 (2005-10-01), None
patent: 2007-155868 (2007-06-01), None
patent: 2007-219079 (2007-08-01), None
patent: 2007-286153 (2007-11-01), None
patent: 2009-069195 (2009-04-01), None
Extended European Search Report issued for corresponding European Application No. 09 25 0860.

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