Ledil Oy

Joni Palm

Kimmo Harjunpää

Light diffuser

An optical device () comprises a lens () having a light ingress surface () and a light egress surface (). The light ingress surface comprises one or more V-shaped projections on a center area () of the light ingress surface and the light ingress surface is free from corners on areas () 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 () of a light source () 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.

Growing community of inventors

Salo, Finland

Joni Palm