US Patent 11204150 Optical lens and light emitting module

The invention discloses an optical lens and a light emitting module having the same. The optical lens includes an incident surface around a recess in a center of the bottom surface; a light exit surface for emitting light incident; and a flange portion disposed between the light exit surface and a second edge of the bottom surface. A bottom of the recess has a width in a first axis direction that is greater than a width in a second axis direction orthogonal to the first axis direction. An outer diameter of the bottom surface has a length in the first axis direction that is smaller than a length in the second axis direction. The bottom surface includes a first rough region around the recess and second and third rough regions around the first rough region.