A light emitting apparatus (100A, 100B), comprising: a light source; and a lens located on the light source, wherein the lens comprises: an upper surface; a lower surface located under the upper surface such that the lower surface is opposite the light source; a lateral surface connected between the upper surface and the lower surface, wherein the lateral surface comprises a plurality of segments (S3L, S3U) inclined at angles different from each other; and a flange extending from the upper surface in a direction intersecting a light axis of the light source, wherein the plurality of segments (S3L, S3U) comprises an upper segment (S3U) and a lower segment (S3L), wherein the lower segment (S3L) has a first pattern comprising blind holes and rods (131, 133) and having a first root mean square, RMS, roughness, characterized in that the blind holes and rods (131, 133) form a quadrangular sectional shape being periodically arranged at an interval T, wherein light emitted from the light source is incident upon the lower surface, and is then refracted by the lower surface, wherein a first part of the light refracted by the lower surface is reflected by the upper surface, is incident upon the upper segment (S3U), is reflected by the upper segment (S3U), and then exits from the lens, wherein a second part of the light refracted by the lower surface is reflected by the upper surface, is incident upon the lower segment (S3L), is reflected by the lower segment (S3L), is directed to the upper segment (S3U), is refracted by the upper segment (S3U), and then exits from the lens, wherein a third part of the light refracted by the lower surface is reflected by the upper surface, is incident upon the lower segment (S3L), and is then scattered by the lower segment (S3L), and wherein the lower segment (S3L) extends from the lower surface toward the upper segment (S3U) in a state of being inclined, and the upper segment (S3U) extends from the lower segment (S3L) toward the flange in a state of being inclined. a light source; and a lens located on the light source, wherein the lens comprises: an upper surface; a lower surface located under the upper surface such that the lower surface is opposite the light source; a lateral surface connected between the upper surface and the lower surface, wherein the lateral surface comprises a plurality of segments (S3L, S3U) inclined at angles different from each other; and a flange extending from the upper surface in a direction intersecting a light axis of the light source, an upper surface; a lower surface located under the upper surface such that the lower surface is opposite the light source; a lateral surface connected between the upper surface and the lower surface, wherein the lateral surface comprises a plurality of segments (S3L, S3U) inclined at angles different from each other; and a flange extending from the upper surface in a direction intersecting a light axis of the light source, wherein the plurality of segments (S3L, S3U) comprises an upper segment (S3U) and a lower segment (S3L), wherein the lower segment (S3L) has a first pattern comprising blind holes and rods (131, 133) and having a first root mean square, RMS, roughness, characterized in that the blind holes and rods (131, 133) form a quadrangular sectional shape being periodically arranged at an interval T, wherein light emitted from the light source is incident upon the lower surface, and is then refracted by the lower surface, wherein a first part of the light refracted by the lower surface is reflected by the upper surface, is incident upon the upper segment (S3U), is reflected by the upper segment (S3U), and then exits from the lens, wherein a second part of the light refracted by the lower surface is reflected by the upper surface, is incident upon the lower segment (S3L), is reflected by the lower segment (S3L), is directed to the upper segment (S3U), is refracted by the upper segment (S3U), and then exits from the lens, wherein a third part of the light refracted by the lower surface is reflected by the upper surface, is incident upon the lower segment (S3L), and is then scattered by the lower segment (S3L), and wherein the lower segment (S3L) extends from the lower surface toward the upper segment (S3U) in a state of being inclined, and the upper segment (S3U) extends from the lower segment (S3L) toward the flange in a state of being inclined.