发明人：
VAN BOMMEL, TIES | HIKMET, RIFAT, ATA, MUSTAFA
摘要：
The invention provides a lighting device (1) comprising: - one or more light sources (10) configured to provide light source light (11); - a luminescent element (5) comprising an elongated luminescent body (100) having a radiation input face (111) for receipt of the light source light (11), the luminescent element (5) comprising a first luminescent material (120) for conversion of at least part of the light source light (11) into luminescent material light (8); - a light guide element (850), configured downstream of the first luminescent material (120), and configured to light guide at least part of the first luminescent material light (8); - a second luminescent material (1120), configured downstream of the first 10 luminescent material (120), at a first distance (d1) of at least 0.5 mm thereof, configured to convert one or more of (i) at least part of the light source light (11) and (ii) at least part of the first luminescent material light (8) into second luminescent material light (1128) having a spectral power distribution differing from a spectral power distribution of the first luminescent material light (8);15 - a light transmissive optical element (24) configured downstream of the light guide element (850), configured to receive at least part of the first luminescent material light (8) of the light guide element (850) and to receive at least part of the second luminescent material light (1128), and configured to transmit the received luminescent material light (8) and the received second luminescent material light (1128), and configured to beam shape at least part of the received luminescent material light (8), and to provide lighting device light (101) comprising one or more of the light source light (11), the first luminescent material light (8) and the second luminescent material light (1128).
技术问题语段：
The technical problem addressed in this patent is the need for high brightness light sources for various applications such as spotlighting, stage-lighting, and digital light projection. The invention proposes a lighting device that uses a light concentrator to convert shorter wavelength light to longer wavelengths in a highly transparent luminescent material, resulting in a higher intensity output beam. The light concentrator comprises a rectangular bar of a phosphor doped, high refractive index garnet.
技术功效语段：
The patent text describes a lighting device that uses a light concentrator to convert short-wavelength light into longer-wavelength light. This light is then emitted from one of the surfaces of the concentrator. The device can be used in various applications such as stage-lighting, headlamps, and digital light projection. The technical effect of this invention is to provide a high-brightness light source that can be used in these applications.
权利要求：
CLAIMS:
1. A lighting device (1) comprising:
a plurality of light sources (10) configured to provide light source light (11); a luminescent element (5) comprising an elongated luminescent body (100) having a radiation input face (11 1) for receipt of the light source light (11), the luminescent element (5) comprising a first luminescent material (120) for conversion of at least part of the light source light (11) into luminescent material light (8);
a light guide element (850), configured downstream of the first luminescent material (120), and configured to light guide at least part of the first luminescent material light (8), wherein the light guide element (850) does not comprise a luminescent material; - a second luminescent material (1120), configured downstream of the first luminescent material (120), at a first distance (dl) thereof, and configured downstream of the light guide element (850), the second luminescent material (1 120) further configured to convert one or more of (i) at least part of the light source light (11) and (ii) at least part of the first luminescent material light (8) into second luminescent material light (1128) having a spectral power distribution differing from a spectral power distribution of the first luminescent material light (8);
a light transmissive optical element (24) configured downstream of the light guide element (850), configured to receive at least part of the first luminescent material light (8) of the light guide element (850) and to receive at least part of the second luminescent material light (1 128), and configured to transmit the received first luminescent material light (8) and the received second luminescent material light (1128), and configured to beam shape at least part of the received first luminescent material light (8), and to provide lighting device light (101) comprising one or more of the first luminescent material light (8) and the second luminescent material light (1128),
- wherein the radiation input face (11 1) is configured parallel to a body axis
(BA) of the elongated luminescent body (100), and wherein the light sources (10) are configured to provide light source light (1 1) only to the elongated luminescent body (100).
2. The lighting device (1) according to claim 1, wherein the light guide element (850) and the light transmissive optical element (24) comprise the same material, wherein the elongated luminescent body (100) and the light transmissive optical element (24) have different material compositions, and wherein the light guide element (850) and the light transmissive optical element (24) both comprise one or more materials selected from the group consisting of a glass, sapphire, quartz, a ceramic material, an essentially undoped garnet, and a single crystalline material.
3. The lighting device (1) according to any one of the preceding claims, wherein the elongated luminescent body (100) and the light guide element (850) are optically coupled.
4. The lighting device (1) according to any one of the preceding claims, comprising a luminescent material layer (1228) configured between the light guide element (850) and the light transmissive optical element (24), wherein the luminescent material layer (1228) comprises the second luminescent material (1 120).
5. The lighting device (1) according to any one of the preceding claims, wherein the light transmissive optical element (24) comprises the second luminescent material (1 120). 6. The lighting device (1) according to claim 5, wherein the light transmissive optical element (24) comprises an optical element cavity (1241) configured to beam shape at least part of the first luminescent material light (8) received via the light guide element (850), wherein the optical element cavity (1241) comprises the second luminescent material (1 120). 7. The lighting device (1) according to any one of the preceding claims, wherein the light transmissive optical element (24) comprises a compound parabolic collimator.
8. The lighting device (1) according to any one of the preceding claims, further comprising a second luminescent body (1328) comprising the second luminescent material (1120), wherein the light transmissive optical element (24) comprises a receptor cavity (1020) for hosting the second luminescent body (1328).
9. The lighting device (1) according to any one of the preceding claims, wherein the light guide element (850) and the light transmissive optical element (24) are a single body, consisting of the same material. 10. The lighting device (1) according to any one of the preceding claims, wherein the light guide element (850) is elongated, having a length (LI) selected from the range of 0.5-20 mm, wherein the elongated luminescent body (100) has a body axis (BA), wherein the light guide element (850) has a body axis (BA1), wherein the body axes (ΒΑ,ΒΑΙ) are collinear, and wherein the first distance (dl) is at least 0.5 mm.
11. The lighting device (1) according to any one of the preceding claims, further comprising a dichroic mirror that is configured between the light guide element (850) and the second luminescent material. 12. The lighting device (1) according to any one of the preceding claims, wherein the first luminescent material (120) is configured to provide one or more of green and yellow luminescent material light (8), wherein the second luminescent material (1 120) is configured to provide red second luminescent material light (1128), and wherein the lighting device (1) is configured to provide white lighting device light (101).
13. A lighting system (1000) comprising one or more lighting devices (1) according to any one of the preceding claims, and a control system, wherein two or more luminescent elements (5) are configured to provide luminescent material light (120) with different spectral power distributions, and wherein the control system is configured to control one or more sets (310) of light sources (10).
14. A projection system (1000) comprising the lighting device (1) according to any one of the preceding claims 1 -12 or the lighting system according to claim 13. 15. A luminaire (1 100) comprising the lighting device (1) according to any one of the preceding claims 1-12 or the lighting system according to claim 13.