Luminaire using holographic optical element and luminescent material

Patent metadata

Field	Value
Publication number	US-10711978-B2
Application number	US-201816227028-A
Country	US
Kind code	B2
Filing date	Dec 20, 2018
Priority date	Jul 9, 2018
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

An example luminaire includes a laser light source, a photoluminescent material and a holographic optical element. The holographic optical element has a hologram optically coupled to the laser light source and to the photoluminescent material. The hologram is configured to distribute light received from the laser light source as a pattern of light to the photoluminescent material.

First claim

What is claimed is:

1. A luminaire, for a general illumination application, the luminaire comprising:
a laser light source;
a holographic optical element, coupled to receive a beam of light from the laser light source, and having a hologram configured to distribute light from the beam as a pattern of light;
a photoluminescent material configured to convert one or more wavelengths of incident light to wavelengths of light to provide an intended color characteristic of light for the general illumination application of the luminaire, the photoluminescent material being located to receive the pattern of light from the holographic optical element; and
an optical system coupled to the photoluminescent material to distribute light from the photoluminescent material over an optical output distribution for the general illumination application of the luminaire;
wherein:
the hologram is configured to: split the beam of light from the laser light source into a plurality of beams forming the pattern of light, and to direct the plurality of beams to a plurality of regions of the photoluminescent material, and
the optical system comprises a plurality of optics each coupled to a respective one of the regions of the photoluminescent material on at least one substrate.

2. The luminaire of claim 1 , wherein the holographic element is a transmissive holographic element.

3. The luminaire of claim 1 , wherein the holographic element is a reflective holographic element.

4. The luminaire of claim 1 , wherein the at least one substrate comprises a light transmissive substrate supporting the regions of the photoluminescent material.

5. The luminaire of claim 1 , wherein:
the at least one substrate comprises a light transmissive substrate, supporting the photoluminescent material, at a distance from the holographic optical element to receive the pattern of light as a projection on the photoluminescent material, and
the light transmissive substrate is substantially flat.

6. The luminaire of claim 1 , wherein:
the at least one substrate comprises a light transmissive substrate, supporting the photoluminescent material, to receive the pattern of light as a projection on the photoluminescent material, and
the light transmissive substrate is curved relative to the projection.

7. The luminaire of claim 6 , wherein a curvature of the light transmissive substrate is such that the photoluminescent material on the light transmissive substrate varies in distance from the holographic optical element.

8. The luminaire of claim 1 , further comprising:
an optical filter located between the holographic optical element and the photoluminescent material,
wherein the optical filter is configured to pass light in a first wavelength bandwidth of the laser light source through the optical filter to the photoluminescent material.

9. The luminaire of claim 8 , wherein the optical filter is further configured to reflect converted light of a second wavelength band from the photoluminescent material toward an output of the luminaire, the second wavelength band being different from the first wavelength band.

10. A luminaire, for a general illumination application, the luminaire comprising:
a laser light source;
a holographic optical element, coupled to receive a beam of light from the laser light source, and having a hologram configured to distribute light from the beam as a pattern of light;
a photoluminescent material configured to convert one or more wavelengths of incident light to wavelengths of light to provide an intended color characteristic of light for the general illumination application of the luminaire, the photoluminescent material being located to receive the pattern of light from the holographic optical element; and
an optical system coupled to the photoluminescent material to distribute light from the photoluminescent material over an optical output distribution for the general illumination application of the luminaire, the optical system including:
a light transmissive substrate, supporting the photoluminescent material, to receive the pattern of light as a projection on the photoluminescent material,
wherein the light transmissive substrate is curved relative to the projection.

11. A luminaire, for a general illumination application, the luminaire comprising:
a laser light source;
a holographic optical element, coupled to receive a beam of light from the laser light source, and having a hologram configured to distribute light from the beam as a pattern of light;
a photoluminescent material configured to convert one or more wavelengths of incident light to wavelengths of light to provide an intended color characteristic of light for the general illumination application of the luminaire, the photoluminescent material being located to receive the pattern of light from the holographic optical element;
an optical filter located between the holographic optical element and the photoluminescent material, wherein the optical filter is configured to pass light in a first wavelength bandwidth of the laser light source through the optical filter to the photoluminescent material; and
an optical system coupled to the photoluminescent material to distribute light from the photoluminescent material over an optical output distribution for the general illumination application of the luminaire.

12. A general illumination lighting device, comprising:
a laser light source;
a photoluminescent material;
a holographic optical element optically coupled to the laser light source and to the photoluminescent material, the holographic element having a hologram configured to distribute light received from the laser light source as a pattern of light to the photoluminescent material;
an optical system coupled to the photoluminescent material to distribute light from the photoluminescent material over an optical output distribution of the general illumination lighting device; and
a controllable drive circuit to supply power to the laser light source;
wherein:
the hologram is configured to: split the beam of light from the laser light source into a plurality of beams forming the pattern of light, and to direct the plurality of beams to a plurality of regions of the photoluminescent material, and
the optical system comprises a plurality of optics each coupled to a respective one of the regions of the photoluminescent material on at least one substrate.

13. The general illumination lighting device of claim 12 , further comprising a processor coupled to control operation of the laser light source via the controllable drive circuit.

14. The general illumination lighting device of claim 12 , wherein the laser light source includes a laser diode.

15. The general illumination lighting device of claim 12 , wherein the laser light source includes a plurality of laser diodes.

16. The general illumination lighting device of claim 12 , wherein the holographic element is a transmissive holographic element.

17. The general illumination lighting device of claim 12 , wherein the holographic element is a reflective holographic element.

18. A general illumination lighting device, comprising:
a laser light source;
a photoluminescent material;
a holographic optical element optically coupled to the laser light source and to the photoluminescent material, the holographic element having a hologram configured to distribute light received from the laser light source as a pattern of light to the photoluminescent material; and
an optical system coupled to the photoluminescent material to distribute ligh

Assignees

• Abl Ip Holding Llc

Inventors

• Ramer David P
• Lin Guan-Bo
• Mao An
• Aggarwal Januk
• Rogers Rashmi Kumar

Classifications

• F21V5/003 Primary

  using holograms · CPC title

• G02B5/32

  Holograms used as optical elements · CPC title

• F21V3/12

  the coatings comprising photoluminescent substances · CPC title

• F21V9/32 Primary

  characterised by the arrangement of the photoluminescent material · CPC title

• F21S8/04

  intended only for mounting on a ceiling or the like overhead structures (F21S8/02 takes precedence; {details of ceiling bases F21V21/03}) · CPC title