# US 2024/0201510 A1 · Optics for slim style head lighting

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- Number: US 2024/0201510 A1
- Document ID: US20240201510A1
- Status: Published application
- Kind: A1
- Application number: 18/517,792
- Filed: 2023-11-22
- Published: 2024-06-20
- Earliest claimed: 2022-12-15
- Assignees: Lumileds LLC
- Applicants: Lumileds LLC
- Inventors: Floris Maria Hermansz CROMPVOETS; Andreas TIMINGER
- Web page: https://patentgrep.com/patent/US20240201510A1

## CPC

- G02B 27/30: Collimators
- F21S 41/143: the main emission direction of the LED being parallel to the optical axis of the illuminating device
- F21S 41/25: Projection lenses
- G02B 3/0056: {arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses (G02B3/0043 takes precedence; miniaturised objectives for electronic devices employing wafer level optics G02B13/0085)}
- G02B 27/0905: {Dividing and/or superposing multiple light beams}
- G02B 27/0916: {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)}
- G02B 27/0938: {Using specific optical elements}
- G02B 27/0961: {Lens arrays (lens arrays per se G02B3/0006)}
- F21Y 2115/10: Light-emitting diodes [LED]
- G02B 2003/0093: {characterised by the shape}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 1)

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.

### Claim 5 (depends on 4)

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.

### Claim 6 (depends on 4)

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.

### Claim 7 (depends on 1)

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

### Claim 8 (depends on 7)

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

### Claim 9 (depends on 7)

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.

### Claim 10 (depends on 1)

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

### Claim 11 (depends on 10)

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.

### Claim 12 (depends on 1)

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.

### Claim 13 (depends on 1)

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

### Claim 14 (depends on 1)

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.

### Claim 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.