Patent ID: 8179615

Claim:
An image pickup optical lens assembly, sequentially arranged from an object side to an image side, comprising: a first lens element with positive refractive power, having a convex object-side surface; a second lens element with negative refractive power; a third lens element with refractive power; a fourth lens element with refractive power, having a concave object-side surface and a convex image-side surface, both object-side surface and image-side surface thereof being aspheric; and a fifth lens element with refractive power, having a convex object-side surface and a concave image-side surface, both object-side surface and image-side surface thereof being aspheric; wherein T 12 is an axial distance between the first lens element and the second lens element, T 23 is an axial distance between the second lens element and the third lens element, CT 4 is a thickness of the fourth lens element near the optical axis, CT 5 is a thickness of the fifth lens element near the optical axis, f is a focal length of the image pickup optical lens assembly, f 1 is a focal length of the first lens element, and the following relations are satisfied: 0.3< T 12 /T 23 <1.8; 0.2 <CT 4 /CT 5 <0.9; 0.85 <f/f 1 <1.55.