发明人：
HOELEN, CHRISTOPH, GERARD, AUGUST | KADIJK, SIMON, EME | HAENEN, LUDOVICUS, JOHANNES, LAMBERTUS | LI, YUN
代理人：
MALLENS, ERIK, PETRUS, JOHANNES ET AL.
摘要：
The invention provides a lighting device (1) comprising a luminescent element (5) comprising an elongated light transmissive body (100), the elongated light transmissive body (100) comprising a side face (140), wherein the elongated light transmissive body (100) comprises a luminescent material (120) configured to convert at least part of a light source light (11) selected from one or more of the UV, visible light, and IR received by the elongated light transmissive body (100) into luminescent material radiation (8). The invention further provides such luminescent element per se.
权利要求：
CLAIMS:
1. A lighting device (1) comprising:
a light source (10) configured to provide light source light (1 1); a luminescent element (5) comprising an elongated light transmissive body (100), the elongated light transmissive body (100) comprising a side face (140), wherein: - the elongated light transmissive body (100) comprises a luminescent material
(120) configured to convert at least part of a light source light (1 1) selected from one or more of the UV, visible light, and IR received by the elongated light transmissive body (100) into luminescent material radiation (8);
the elongated light transmissive body (100) has a first face (141) and a second face (142) defining a length (L) of the elongated light transmissive body (100); and
one or more of the first face (141) and the second face (142) comprise a plane (1140) comprising surface modulations (1141) thereby creating different modulation angles (β) relative to the respective plane (1140),
wherein the elongated light transmissive body (100) comprises a radiation input face (11 1) and a first radiation exit window (1 12); wherein the luminescent material (120) is configured to convert at least part of light source light (11) received at the radiation input face (1 11) into luminescent material radiation (8), and the luminescent element (5) configured to couple at least part of the luminescent material radiation (8) out at the first radiation exit window (1 12) as converter radiation (101),
- wherein the side face (140) comprises the radiation input face (1 11), wherein the second face (142) comprises the radiation exit window (1 12), and
wherein the modulation angles β relative to the respective plane (1 140) are equal to or smaller than 45°.
2. The lighting device (1) according to claim 1, wherein the plane (1 140) comprise n/cm2facets (1142) as modulations (1141), wherein n is selected from the range of 2-500, with at least 2 facets (1142) having different modulation angles (β).
3. The lighting device (1) according to any one of the preceding claims, wherein the plane (1 140) comprises at least four different modulation angles (β).
4. The lighting device (1) according to any one of the preceding claims, wherein: - the elongated light transmissive body (100) has an axis of elongation (BA);
the side face (140)) comprises a curvature with a radius (r); and the modulations (1141) have angles (γ) relative to perpendiculars (rl) to the axis of elongation (BA) selected from the range of 0-90°. 5. The lighting device (1) according to any one of the preceding claims, wherein the elongated light transmissive body (100) has a tubular shape having a cavity (1 150) surrounded by the elongated light transmissive body, and the modulations (1 141) have angles (γ) relative to perpendiculars (rl) to the axis of elongation (BA) selected from the range of 0- 35°.
6. The lighting device (1) according to claim 5, wherein at least part of the cavity (1150) comprises a light transmissive material (1151), differing in composition from the composition of the material (121) of the elongated light transmissive body (100), wherein the light transmissive material (1151) in the cavity has an index of refraction equal to or lower than the light transmissive material (121) of the light transmissive body (100).
7. The lighting device (1) according to any one of the preceding claims 1 -4, wherein the elongated light transmissive body (100) has an axis of elongation (BA) and a circular cross-section perpendicular to the axis of elongation (BA).
8. The lighting device (1) according to any one of the preceding claims, wherein the elongated light transmissive body (100) tapers along at least part of the length of an axis of elongation (BA). 9. The lighting device (1) according to any one of the preceding claims, wherein one or more of the first face (141) and the second face (142) comprise a plane (1 140) comprising surface modulations (1141) thereby creating different modulation angles (β) relative to the respective plane (1 140).
10. The lighting device (l)according to any one of the preceding claims, further comprising an optical element (24) optically coupled to the elongated light transmissive body (100). 11. The lighting device (1) according to claim 25, wherein the elongated light transmissive body (100) and the optical element (24) are a single body.
12. The lighting device (1) according to any one of the preceding claims, wherein the optical element (24) is selected from the group consisting of a compound parabolic concentrator, an adapted compound parabolic concentrator, a dome, a wedge-shaped structure, and a conical structure, and wherein the elongated light transmissive body (100) is obtainable by a process comprising (a) one or more of extrusion, injection molding, pressing, and casting, and (b) sintering. 13. The lighting device (1) according to any one of the preceding claims, wherein the modulation angles β relative to the respective plane 1140 are equal to or smaller than 25°.
14. The lighting device (1) according to any one of the preceding claims, further comprising an optical element (24), wherein the optical element (24) is configured to one or more of (i) collimating the luminescent radiation (8) and (ii) extracting luminescent radiation (8) from the elongated light transmissive body (100), and wherein the optical element (24) is (a) optically coupled to the elongated light transmissive body (100), or wherein the optical element (24) and the elongated light transmissive body (100) are comprised by a single body. 15. A projection system (2) or a luminaire comprising a lighting device (1) according to any one of the preceding claims.