LED light distribution lens, LED lighting module having LED light distribustion lens and lighting equipment having LED lighting module

摘要

LED light distribution lens having a light emitting surface whose shape is circular in its plan view, which emits forward light from LED disposed in its center. The LED light distribution lens is characterized by the construction of the emitting surface which is low at production cost and so designed as not to cause the diffuse reflection and unintended diffusion. Such emitting surface has a plural convex surfaces formed both in its radial and its circumferential directions in a manner that the convex surfaces surround the circumference of the LED and has continuous surfaces formed such that the boundary portions of the convex surfaces constitute the concave surfaces, thereby realizing expected light distribution based on design specification.