公开(公告)号：US11525987B2

公开(公告)日：2022-12-13

申请号：US17297648

申请日：2019-10-24

Applicant: LEDIL OY

Inventor： Yrjö-Sakari Matikainen

IPC: G02B19/00 ,  F21V7/09 ,  G02B5/30 ,  F21Y115/10

Abstract: An optical device includes a reflector-section that includes a light-ingress surface for receiving light from a light source, a reflector surface for reflecting the light based on total internal reflection, and a light-egress surface through which the reflected light exits the optical device. When the light source is at a predetermined position with respect to the optical device, an angle of incidence (θi) of the light at the light-egress surface is a polarization angle at which a p-polarized component of the light is transmitted through the light-egress surface without being reflected by the light-egress surface. Thus, unwanted reflections at the light-egress surface can be reduced and thereby unwanted scattering of light is reduced while having good transmitting efficacy.

公开(公告)号：US11555989B2

公开(公告)日：2023-01-17

申请号：US17297648

申请日：2019-10-24

Applicant: LEDIL OY

Inventor： Yrjö-Sakari Matikainen

IPC: G02B19/00 ,  F21V7/09 ,  G02B5/30 ,  F21Y115/10

Abstract: An optical device includes a reflector-section that includes a light-ingress surface for receiving light from a light source, a reflector surface for reflecting the light based on total internal reflection, and a light-egress surface through which the reflected light exits the optical device. When the light source is at a predetermined position with respect to the optical device, an angle of incidence (θi) of the light at the light-egress surface is a polarization angle at which a p-polarized component of the light is transmitted through the light-egress surface without being reflected by the light-egress surface. Thus, unwanted reflections at the light-egress surface can be reduced and thereby unwanted scattering of light is reduced while having good transmitting efficacy.

公开(公告)号：US11255511B2

公开(公告)日：2022-02-22

申请号：US16977564

申请日：2018-11-01

Applicant: LEDIL OY

Inventor： Yrjö-Sakari Matikainen

IPC: F21V5/04 ,  B29D11/00 ,  C03B19/02 ,  G02B19/00 ,  F21Y115/10 ,  F21V7/00

Abstract: An optical device includes a center section having a lens portion for modifying distribution of a first part of light emitted by a light source, and a peripheral section surrounding the center section and including a conical surface for modifying distribution of a second part of the light emitted by the light source. The conical surface includes ridges where total internal reflection takes place when a light beam arrives from the light source at one of side surfaces of each ridge, and surface penetration takes place when the reflected light beam arrives at the other side surface of the ridge under consideration. Thus, the conical surface acts both as a reflective surface and as a refractive surface for achieving a desired light distribution pattern.