CONCENTRATING LENS FOR LED AND DESIGNING METHOD THEREOF

摘要

PURPOSE: A concentrating lens for a LED is provided to locally illuminate a place by collecting light from a LED chip. CONSTITUTION: A non-spherical part(10) is formed in the central part of a condensing lens. A fresnel lens part(20) is formed in the outside of the non-spherical part and includes a plurality of Fresnel patterns. A light emitting surface(30) irradiates the light which is absorbed to the non-shperical part and the light passing through the fresnel lens part. The non-spherical part controls the oriented angle of the lights which are absorbed from a first virtual light emitting point.