Light emitting device and lens thereof

Abstract

A lens and a light emitting device applying the same are provided. The lens has a first profile along a first cross-section and a second profile along a second cross-section perpendicular to the first cross-section. The first profile is asymmetric with respect to the second cross-section, and the second profile is symmetric with respect to the first cross-section. A contour center of a light emergent surface of the lens is located on an intersection of the first cross-section and the second cross-section. The light emergent surface comprises a first curved surface and a second curved surface being connected with each other at the second cross-section. Furthermore, a curvature of the first curved surface and a curvature of the second curved surface are discontinuous at the contour center. The light emitting device applies the lens for receiving a light emitted from a light source and provides an asymmetric light output.

Dependencies are inferred from the claim text.