PHOTOGRAPHING LENS OPTICAL SYSTEM

摘要

Provided is a photographing lens optical system achieving high performance with low expenses. The lens optical system includes first to fourth lenses sequentially arranged along a light path between an object and an image sensor on which an image of the object is formed. The first lens has a negative refractive power and an incident surface convex toward the object, the second lens has a positive refractive power and an exit surface concave from the image sensor, the third lens has a positive refractive power and an exit surface convex toward the image sensor, and the fourth lens has a negative refractive power and an incident surface that is an aspherical surface having two or more inflection points.

主权项

1. A lens optical system comprising:
first to fourth lenses sequentially arranged along a light proceeding path between an object and an image sensor on which an image of the object is formed, wherein the first lens has a negative refractive power and an incident surface convex toward the object, the second lens has a positive refractive power and an exit surface concave from the image sensor, the third lens has a positive refractive power and an exit surface convex toward the image sensor, the fourth lens has a negative refractive power and an incident surface that is an aspherical surface having two or more inflection points, and the lens optical system satisfies the following condition
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