Ledil Oy

Salcomp Oy

Kimmo Harjunpää

Hannu Hukkanen

Joni Palm

Juha Tuulaniemi

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.

Optical device for modifying a light distribution

An optical device for modifying a light distribution pattern of a light source is presented. The light source radiates first light beams to a first geometric quarter-space and second light beams to a second geometric quarter-space, where the first and second quarter-spaces are defined by mutually perpendicular geometric planes one of which constitutes a boundary between the first and second geometric quarter-spaces. The optical device may include a lens-section for modifying a light distribution pattern of the first light beams and a reflector surface for reflecting at least a part of the second light beams from the second geometric quarter-space to the first geometric quarter-space. The reflector surface is shaped to resemble a wedge that points towards the first geometric quarter-space so as to provide total internal reflection and to direct the reflected second light beams to sideward directions.

Optical device for modifying light distribution

Charger

Growing community of inventors

Halikko, Finland

Kimmo Harjunpää