发明人：
HIKMET, RIFAT, ATA, MUSTAFA | VAN BOMMEL, TIES | ANSEMS, JOHANNES, PETRUS, MARIA
摘要：
Starting sheet material (1) adapted for forming a reflector (2) for a lighting device (40), the starting sheet material (1) comprising a flat reflective sheet material (14) shaped as a sector of an annulus bendable into a parabolic reflector or a truncated cone reflector, the flat reflective sheet material (1) comprising a first surface (3), a second surface (4), a first edge (5) shaped as a segment of a circle with a first radius and a second edge (6) shaped as a segment of a circle with a second radius, the second radius being smaller than the first radius, a third edge (7) and a fourth edge (8), the third edge (7) and the fourth edge (8) extending between said first edge (5) and said second edge (6), wherein optical structures (9) are provided on at least a part of one of the first surface (3) and the second surface (4), said optical structures (9) enabling collimation and beam shaping of incident light, said optical structures (9) being applied to the flat reflective sheet material (14) along a direction (11) perpendicular to the radial direction (12) of the flat reflective sheet material (1).
技术问题语段：
The technical problem addressed in this patent is the need for a reflector that can be easily customized and produced in large quantities, while still maintaining high collimation and flexibility of the reflector. The solution provided is a starting sheet material that can be easily bent into the shape of the reflector, and can be produced using a 3D printing process.
权利要求：
CLAIMS:
1. Starting sheet material (1) adapted for forming a reflector (2, 20, 200) for a lighting device, the starting sheet material comprising:
a flat reflective sheet material (14) shaped as a sector of an annulus bendable into a parabolic reflector or a truncated cone reflector, the flat reflective sheet material comprising a first surface (3), a second surface (4), a first edge (5) shaped as a segment of a circle with a first radius and a second edge (6) shaped as a segment of a circle with a second radius, the second radius being smaller than the first radius, a third edge (7) and a fourth edge (8), the third edge and the fourth edge extending between said first edge and said second edge, wherein
optical structures (9) are provided on at least a part of at least one of the first surface and the second surface, said optical structures enabling collimation and/or beam shaping of incident light,
said optical structures (9) being applied to the flat reflective sheet material (14) along a direction (11) perpendicular to the radial direction (12) of the flat reflective sheet material, and
wherein said optical structures (9) are optical structures enabling reflection of at least a portion of the incident light at the flat reflective sheet material after two refractions on the optical structures. 2. Starting sheet material according to claim 1, wherein said optical structures (9) are applied to the flat reflective sheet material such that a gradient in density of the optical structures in the radial direction of the flat reflective sheet material is provided.
3. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are provided on a part of the one of the first surface and the second surface of the flat reflective sheet material being closest to said second edge.
4. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are provided directly on at least a part of the one of the first surface and the second surface.
5. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are provided on the first surface and the second surface, or on all of the at least one of the first surface and the second surface, or on all of the first surface and the second surface.
6. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are based on flexible polymer material.
7. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are applied to the flat reflective sheet material by means of printing or fused deposition modelling.
8. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are any one of:
refractive optical structures,
diffractive optical structures,
photonic crystals,
continuous optical structures,
segmented optical structures, and
combinations thereof.
9. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are provided on the flat reflective sheet material in such a way that the density of the optical structures is any one of:
more than 40 %,
more than 60 %, and
more than 70 %.
10. Starting sheet material according to any one of the above claims, wherein any one or more of the optical structures (9), the flat reflective sheet material (14) and the whole starting sheet material (1) is obtained by 3D printing. 11. A reflector (2) for a lighting device, the reflector (2) comprising a starting sheet material (1) according to any one of the above claims, wherein said starting sheet material is bent in such a way that the one of the first surface (3) and the second surface (4) of the flat reflective sheet material (14) comprising said optical structures (9) form a surface facing towards a center axis (13) of the reflector, and the third edge (7) and the fourth edge (8) of the flat reflective sheet material are brought into contact with one another.
12. A reflector according to claim 11, wherein the third edge (7) and the fourth edge (8) of the flat reflective sheet material are connected with one another. 13. A reflector according to claim 11 or 12, wherein the reflector (2) is a truncated cone shaped reflector or a parabolic reflector, and/or wherein the reflector is a specular reflector.
14. A lamp, a luminaire, a lighting fixture, a tunable lamp, a tunable luminaire, a tunable lighting fixture, a directional lamp, a directional luminaire or a directional lighting fixture comprising a reflector according to any one of the above claims 11-13 or a starting sheet material according to any one of the above claims 1-10.