Patent ID: 9360169
Filing Date: 2016-06-07
CPC Classification: F21V,F21Y,G02B

Claim Text:
1. A lens having a light source recess for disposing a light source and an optical axis passing a center of the light source recess, the lens further comprising: a first light emitting concave surface facing to the light source recess; and a second light emitting concave surface connected to the first light emitting concave surface and wherein each of the first light emitting concave surface and the second light emitting concave surface has a profile with at least one tangent line, each of the tangent lines being tangential to an intersecting point on the profile between the first light-emitting concave surface and the second light-emitting concave surface, each of the tangent lines forms an acute angle with the optical axis; and the first light emitting concave surface and the second light emitting concave surface covers an entire surface facing the light source, the optical axis passes the first light emitting concave surface and is spaced away from an intersecting line of the first and second light emitting concave surfaces.