| 摘要 |
The present invention relates to an image optical system. An image optical system of the present invention comprises, in order from the object side: first lens having positive refractive power and a shape in which an object side surface is convex to the object side; second lens having negative refractive power; third lens having negative refractive power; fourth lens having positive refractive power; fifth lens having negative refractive power and a shape in which an upper side surface is convex to the upper side; and sixth lens having negative refractive power and a shape in which an upper side surface is concave to the upper side. |
