公开(公告)号：US20210071843A1

公开(公告)日：2021-03-11

申请号：US17011531

申请日：2020-09-03

Applicant: Ledil Oy

Inventor： Joni PALM ,  Kimmo HARJUNPÄÄ

IPC: F21V5/04 ,  F21K9/69 ,  B29D11/00 ,  G02B3/08

Abstract: An optical device (201) comprises a lens (205) having a light ingress surface (206) and a light egress surface (207). The light ingress surface comprises one or more V-shaped projections on a center area (208) of the light ingress surface and the light ingress surface is free from corners on areas (209) outside the center area. Each V-shaped projection is shaped so that a surface penetration takes place when a light beam arrives at a side surface of the V-shaped projection and a total internal reflection takes place when the light beam arrives at the other side surface of the V-shaped projection. Thus, obliquely arriving light beams emitted by edge areas of a light emitting surface (213) of a light source (202) are mixed better with light beams emitted by other areas of the light emitting surface. Therefore, undesired color variations within a light distribution pattern are reduced.