| 主权项 |
1. An optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising first, second, third, fourth, fifth and sixth lens elements, each of said first, second, third, fourth, fifth and sixth lens elements having refracting power, an object-side surface facing toward the object side and an image-side surface facing toward the image side and a central thickness defined along the optical axis, wherein:
said image-side surface of said first lens comprises a convex portion in a vicinity of the optical axis; said second lens element is constructed by plastic material; said image-side surface of said third lens element comprises a concave portion in a vicinity of the optical axis; said object-side surface of said fourth lens element comprises a concave portion in a vicinity of the optical axis; said image-side surface of said fifth lens element comprises a convex portion in a vicinity of a periphery of the fifth lens element; said object-side surface of said sixth lens element which is constructed by plastic material comprises a convex portion in a vicinity of the optical axis, and said image-side surface thereof comprises a concave portion in a vicinity of the optical axis; the optical imaging lens comprises no other lenses having refracting power beyond the six lens elements; and the central thickness of the second lens element is represented by T2, a sum of all five air gaps from the first lens element to the sixth lens element along the optical axis is represented by AAG, and T2 and AAG satisfy the equation:
AAG/T2≦4.3. |
