摘要：
The invention provides a lighting system (1000) comprising a light source (10), configured to provide light source light (11), a first reflective element (210), a second reflective element (220), and a lens (240), wherein: - the first reflective element (210) tapers from a first end (211) to a second end (212), wherein the first reflective element (210) comprises a first reflective surface (213) bridging the distance between the first end (211) and the second end (212), wherein the first reflective surface (213) is diffuse reflective, and wherein the light source (10) is at least partially circumferentially surrounded by the first reflective surface (213); - the light source (10) is configured closer to the second end (212) than to the first end (211), and wherein the light source (10) is configured to direct at least part of the light source light (11) in the direction of the first end (211); - the lens (240) is configured to beam shape at least part of the light source light (11) emanating from the reflective element (210) and the light source (10); and - the second reflective element (220) is configured to redirect part of the light source light (11) to the lens (240), wherein the second reflective element is configured to specularly reflect at least part of the light source light (11) that reaches the second reflective element (220).
技术问题语段：
The technical problem addressed in this patent is the improvement of LED road lighting systems by overcoming the drawbacks of current systems, such as the pixelated appearance and high glare/brightness contrast. The invention provides a lighting system with a light source, a first reflective element, a lens, and optionally a second reflective element that work together to create a wide beam with a relevant part of the light at high angles, especially useful for street lighting. The lighting system is simple and easy to further tune the beam shape with additional components. The invention also provides a method of producing the lighting system and a kit for creating or adapting it.
技术功效语段：
The invention provides a lighting system that uses a first reflective element and a lens to beam shape the light source light. This results in a wide beam with a relevant part of the light at high angles, which is useful for street lighting. The lighting system is simple and easy to further tune the beam shape with additional option components. The lighting system also provides a relative even distribution of light over an exit window, resulting in better lighting. The light source may be a semiconductor light-emitting device, such as an LED or a laser diode. The light source may also be a chip-on-board light source.
权利要求：
CLAIMS:
1. A lighting system (1000) comprising a light source (10), configured to provide light source light (11), a first reflective element (210), a lens (240) at a varying distance (d2) from the first reflective element (210), and a second reflective element (220) in between the first reflective element (210) and the lens (240), wherein:
- the first reflective element (210) tapers from a first end (211) to a second end
(212), wherein the first reflective element (210) comprises a first reflective surface (213) bridging the distance between the first end (211) and the second end (212), wherein the first reflective surface (213) is diffuse reflective, and wherein the light source (10) is at least partially circumferentially surrounded by the first reflective surface (213);
- the light source (10) is configured closer to the second end (212) than to the first end (211), and wherein the light source (10) is configured to direct at least part of the light source light (11) in the direction of the first end (211);
the lens (240) is configured to beam shape at least part of the light source light (11) emanating from the reflective element (210) and the light source (10); and
- the second reflective element (220) is configured to redirect part of the light source light (11) to the lens (240), wherein the second reflective element is configured to specularly reflect at least part of the light source light (11) that reaches the second reflective element (220), and wherein the second reflective element (220) has different heights (h2) over its length so that over its full length at each location the second reflective element (220) bridges the distance (d2) between the first reflective element (210) and the lens (240).
2. The lighting system (1000) according to claim 1, wherein the lens (240) comprises a Fresnel lens, and wherein the light source (10) comprises a chip-on-board light source.
3. The lighting system (1000) according to any one of the preceding claims, wherein the first reflective element (210) has an opening angle (a), defined by the reflective surface (213), of at least 120° and of at maximum 170°.
4. The lighting system (1000) according to any one of the preceding claims 1-3, wherein the first refiective element (210) is rotationally symmetric.
5. The lighting system (1000) according to any one of the preceding claims 1-3, wherein the first refiective element (210) is non-rotationally symmetric, and wherein at least part of the first reflective element is a 3D printed part.
6. The lighting system (1000) according to any one of the preceding claims, wherein the second refiective element (220) is configured to specularly reflect at least 50% of the light source light (11) that reaches the second reflective element (220).
7. The lighting system (1000) according to claim 6, wherein the first reflective element (210) comprises a reflector wall (214) comprising the first reflective surface (213), wherein the reflector wall (214) comprises a slot (215) for hosting a second reflective element (220).
8. The lighting system (1000) according to claim 7, wherein the first reflective element (210) is rotationally symmetric, and wherein the slot (215) defines part of a circle segment (216), wherein the circle segment (216) has a secant (216a), which may optionally be curved, and wherein the slot (215) defines at least part of the secant (216a).
9. The lighting system (1000) according to any one of the preceding claims, wherein the first reflective element (210) is a truncated cone or pyramid having a base with a perimeter (910), and wherein the second reflective element (220) connects one point (920) on the perimeter (910) with another point (930) on the same perimeter (910), said one point
(920) and said another point (930) are lying apart on the perimeter (910) by an angle B, with β in an angle range 60° <= β <= 170°.
10. The lighting system (1000) according to any one of the preceding claims, wherein not any tangent (960) to a reflective surface, which faces towards the light source, of the second reflective element (220) extends through an optical axis (O).
11 A lamp (100) comprising the lighting system (1000) according to any one of the preceding claims 1-10, wherein the lamp (100) is configured to provide a beam (101) of lamp light with a non-rotationally symmetric shape. 12. A kit of parts (2000) comprising (i) the lighting system (1000) according to any one of the preceding claims 1-10, wherein the first reflective element (210) comprises a reflector wall (214) comprising the first reflective surface (213), wherein the reflector wall (214) comprises a slot (215) for hosting a second reflective element (220), and wherein the kit of parts (2000) further comprises (ii) the second reflective element (220), wherein the second reflective element (220) when configured in the slot (215) is configured to specularly reflect at least 50% of the light source light (11) that reaches the second reflective element (220) during operation of the lighting system (1000).
13. The kit of parts (2000) according to claim 10, wherein the reflector wall (214) comprises a plurality of slots (215), and wherein the kit of parts (2000) comprises a plurality of different second reflective elements (220), wherein the second reflective elements (220) are flexible.
14. A method of providing the lighting system (2000) according to any one of the preceding claims 1-10, wherein the method comprises (i) providing the light source (10), the first reflective element (210) and the lens (240), and (ii) assembling these into the lighting system (2000),
wherein the method comprises providing a reflector wall (214) comprising the first reflective surface (213), wherein the reflector wall (214) comprises a slot (215), wherein the method further comprises providing a second reflective element (220) and configuring the second reflective element (220) in the slot (215), wherein the second reflective element (220) when configured in the slot (215) is configured to specularly reflect at least 50%> of the light source light (11) that reaches the second reflective element (220) during operation of the lighting system (1000).
15. A method of providing light, the method comprising providing lighting system light (1001) with the lighting system (1000) according to any one of the preceding claims 1- 10 or the lamp according to claim 11 wherein relative to an optical axis (O) of the lighting
system (1000) at least 60% of the lighting system light (1001) is provided within an angular range of 40-90° relative to the optical axis (O).