Patent ID: 9169992
Filing Date: 2015-10-27
Classification: F21V,F21Y

Abstract:
1. A lens comprising: a light incident face configured for receiving light from a light emitting diode light source; a light exit face opposite to the light incident face; and a plurality of micro dot patterns arranged on the light exit face; wherein the light incident face is a concave face and the light exit face is a convex face, and the plurality of micro dot patterns are formed on a central portion of the light exit face; wherein the light emitting diode light source is located at an optical axis of the lens, the optical axis penetrates through the light incident face and the light exit face, and both of the light incident face and the light exit face are radially symmetrical relative to the optical axis; wherein the lens further comprises an annular connecting face interconnecting the light incident face and the light exit face, and the exit face comprises a secondary light exit face extending upwardly from an outer periphery of the annular supporting face and a primary light exit face curving inwardly and upwardly towards the optical axis of the lens from a top periphery of the secondary light exit face; wherein the topmost point of the light incident face is higher than the top peripheral edge of the secondary light exit face; and wherein the central portion of the light exit face is recessed inwardly toward the light incident face to define a recess, the plurality of micro dot patterns are received in the recess, and the recess has a depth equal to a thickness of the micro dot patterns.