Optics for slim style head lighting

Patent metadata

Field	Value
Publication number	US-12554144-B2
Application number	US-202318517792-A
Country	US
Kind code	B2
Filing date	Nov 22, 2023
Priority date	Dec 15, 2022
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

An optical system is provided. The optical system includes a light emitting diode that generates light emissions. The optical system includes a collimator that receives the light emissions and that generates a collimated beam. The optical system includes an etendue re-shaper that splits the collimated beam into beam parts and that arranges the beam parts adjacent to each other to generate an adjacent beam part arrangement. The optical system includes micro-lens arrays that receive the adjacent beam part arrangement and that generate beams. Each of the beams includes an optimum optical efficiency or a far field intensity distribution.

First claim

What is claimed is:

1 . An optical system comprising:
a collimator configured to receive light emissions and generate a collimated beam; an etendue re-shaper configured to split the collimated beam into at least two beam parts and arrange the at least two beam parts adjacent to each other to generate an adjacent beam part arrangement; and an optical relay system configured to map a light distribution of a beam part of the at least two beam parts to a same plane as an exit plane of the etendue re-shaper.

2 . The optical system of claim 1 , wherein the optical system comprises a light emitting diode configured to generate the light emissions when powered on.

3 . The optical system of claim 1 , wherein the optical system comprises two or more micro-lens arrays configured to receive the adjacent beam part arrangement and generate two or more beams, each of the two or more beams comprising an optimum optical efficiency and a far field intensity distribution.

4 . The optical system of claim 1 , wherein the etendue re-shaper comprises a first part that propagates the beam part of the at least two beam parts to the optical relay system.

5 . The optical system of claim 4 , wherein the optical relay system is configured to propagate the beam part of the at least two beam parts from the first part to the same plane as the exit plane of the etendue re-shaper.

6 . The optical system of claim 4 , wherein the etendue re-shaper comprises a second part that reshapes a second beam part of the at least two beam parts and propagates the second beam part to the exit plane of the etendue re-shaper.

7 . The optical system of claim 1 , wherein the optical relay system comprises two lenses.

8 . The optical system of claim 7 , wherein the two lenses comprise rectangular shapes.

9 . The optical system of claim 7 , wherein a focal plane of each of the two lenses is at a center plane of another lens of the two lenses.

10 . The optical system of claim 1 , wherein the optical relay system comprises an optical element.

11 . The optical system of claim 10 , wherein the optical element comprises an absorber configured to adjust a flux in the beam part of the collimated beam to match an illuminance of the beam part with an illuminance of a second beam part of the collimated beam at an exit plane of the etendue re-shaper.

12 . The optical system of claim 1 , wherein the etendue re-shaper comprise walls shaped to adjust a phase space volume of the beam part of the collimated beam.

13 . The optical system of claim 1 , wherein the at least two beam parts interact once with each deflecting surface of the etendue re-shaper.

14 . The optical system of claim 1 , wherein the etendue re-shaper comprises a plurality of deflecting surfaces, each of which interacts with a whole beam part of the at least two beam parts.

15 . An optical system comprising:
a collimator configured to receive light emissions and generate a collimated beam; an etendue re-shaper configured to split the collimated beam into at least two beam parts and arrange the at least two beam parts adjacent to each other to generate an adjacent beam part arrangement; and an optical relay system configured to map a light distribution of a beam part of the at least two beam parts to a same plane as an exit plane of the etendue re-shaper, the optical relay system comprising an absorber configured to adjust a flux in the beam part of the collimated beam to match an illuminance of the beam part with an illuminance of a second beam part of the collimated beam at an exit plane of the etendue re-shaper.

Assignees

• Lumileds Llc
• Lumileds Singapore Pte Ltd

Inventors

• Crompvoets Floris Maria Hermansz
• Timinger Andreas

Classifications

• F21S41/143

  the main emission direction of the LED being parallel to the optical axis of the illuminating device · CPC title

• F21S41/25 Primary

  Projection lenses · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• G02B27/0916

  Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers (coupling into light guides using intermediate optical elements G02B6/4204; details of lighting devices in general F21V) · CPC title

• G02B27/0905

  Dividing and/or superposing multiple light beams · CPC title