Patent ID: 8444301

Claim:
A lens comprising: a light incident surface; and a light exiting surface, the light exiting surface comprising: a first curved surface located at the center of the light exiting surface; a first convex surface and a second convex surface arranged at two opposite sides of the first curved surface respectively for converging the light exiting therefrom, the first convex surface, the first curved surface, and the second convex surface connecting in sequence along a first direction; a second curved surface and a third curved surface arranged at another two opposite sides of the first curved surface respectively, the second curved surface, the first curved surface, and the third curved surface connecting in sequence along a second direction, the second direction being substantially perpendicular to the first direction, wherein, the first curved surface diverges the light exiting therefrom on the first direction, and converges the light exiting therefrom on second direction, the light converging power of each of the first convex surface and the second convex surface on the first direction is smaller than the light converging power of each of the first convex surface and the second convex surface on the second direction, the second curved surface and third curved surface diverge the light exiting therefrom on the first direction, and converge the light exiting therefrom on the second direction.