Patent ID: 8459845

Claim:
A light guide lens comprising: a front light-exit surface being a convex surface disposed at an optical axis (Z); a rear end surface formed with a recess, said rear end surface including a curved surface portion that defines an innermost end of said recess, that is disposed at the optical axis (Z), and that is a convex surface, said rear end surface further including an inner surrounding surface portion that extends rearward from a periphery of said curved surface portion; and an outer surrounding surface extending between said front light-exit surface and said rear end surface, said outer surrounding surface diverging forwardly along the optical axis (Z), and including a first curved surface part and a second curved surface part, said first curved surface part and said second curved surface part being disposed on opposite sides of an imaginary plane on which the optical axis (Z) is disposed and being asymmetrical relative to each other with respect to the imaginary plane; wherein a first portion of light refracted by said inner surrounding surface portion is reflected by said first curved surface part and is further refracted by said front light-exit surface to form a first light output, and a second portion of light refracted by said inner surrounding surface portion is reflected by said second curved surface part and is further refracted by said front light-exit surface to form a second light output; wherein the first and second light outputs have an asymmetric distribution relative to a reference plane transverse to the optical axis (Z).