Patent ID: 9405103
Filing Date: 2016-08-02
CPC Classification: G02B,H04N

Claim Text:
1. A lens optical system comprising first through fifth lenses, which are sequentially arranged along a light proceeding path between an object and an image sensor where an image of the object is formed, wherein the first lens has positive refractive power and an incident surface convex towards the object, the second lens has negative refractive power and an emitting surface concave with respect to the image sensor, a third lens has positive refractive power and is a meniscus lens convex towards the image sensor, the fourth lens has negative refractive power and is a meniscus lens convex towards the image sensor, the fifth lens has negative refractive power, wherein at least one of an incident surface and an emitting surface of the fifth lens is aspheric, and the lens optical system satisfies Condition 1 below: wherein V3 denotes an Abbe's number of the third lens and V4 denotes an Abbe's number of the fourth lens.