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    Optical device for modifying light distribution
    2.
    发明授权
    Optical device for modifying light distribution 有权

    公开(公告)号：US10429035B2

    公开(公告)日：2019-10-01

    申请号：US15744230

    申请日：2017-09-13

    Applicant: Ledil Oy

    Inventor： Hannu Hukkanen ,  Kimmo Harjunpää

    IPC: F21V13/04 ,  F21V5/04 ,  F21V5/08 ,  F21V7/00 ,  F21V8/00 ,  G02B19/00 ,  F21V7/04 ,  F21W131/103 ,  F21Y115/10 ,  B29D11/00

    Abstract: 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 a light distribution
    6.
    发明授权
    Optical device for modifying a light distribution 有权

    公开(公告)号：US11359790B2

    公开(公告)日：2022-06-14

    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.

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