Optical assembly, luminaire comprising such assembly and method of manufacturing same

Abstract

The invention relates to an optical assembly (100) for beam shaping, comprising a conical reflector (101) having a diffusely reflective inner surface, a transparent refractive hollow dome-shaped member (102), wherein the transparent refractive hollow dome-shaped member (102) has a proximal end (103) arranged in contact with the conical reflector (101) and a top (104) arranged at a distance from the conical reflector (101), and wherein the top (104) has an opening (105), and the transparent refractive hollow dome-shaped component (102) is manufactured by means of fused deposition modeling (FDM) using a transparent thermoplastic polymer material as a printing material. The invention also relates to a luminaire (10) and a method (200) for manufacturing such an optical assembly (100).

Description

Technical Field

[0001] The present disclosure relates to an optical component for beam shaping, the optical component comprising a conical reflector having a diffusely reflective inner surface, a transparent refractive hollow dome-shaped member, wherein the transparent refractive hollow dome-shaped member has a proximal end arranged in contact with the conical reflector and a top arranged at a distance from the conical reflector. The present disclosure also relates to a lamp comprising the optical component and a method for manufacturing the optical component. Background Art

[0002] In the current situation, reflective optical components are used to obtain beam shaping effects, for example in beam shaping spots and downlight arrangements. This type of reflector requires highly reflective aluminum covering of the flat surfaces in the optical component. Therefore, such reflectors and reflective optical components cannot be manufactured using additive manufacturing techniques.

[0003] DE 10 2019 129 135 (A1) describes the production of an optical component that does not include a reflector by means of printing with droplets. Summary of the invention

[0004] The object of the present invention is to provide an improved solution which alleviates the above-mentioned disadvantages of the present solution.

[0005] It is a first object of the present invention to provide a lighting device which can provide improved beam shaping capabilities, particularly in a forward direction outwards from a light source.

[0006] This object is achieved by the invention according to claim 1 .

[0007] A second object of the present invention is to provide a lighting device which provides an intensity gain, particularly in the aforementioned forward direction.

[0008] This object is achieved by the invention according to claim 10 .

[0009] A third object is to provide an improved manufacturing method by means of additive manufacturing in accordance with the above objects, while providing a more efficient and cheaper manufacturing process.

[0010] This object is achieved by the invention according to claim 14 .

[0011] Preferred embodiments are specified in the dependent claims and are further specified below.

[0012] According to a first aspect of the present invention, an optical component for beam shaping is provided. The optical component of the present invention comprises a conical reflector having a diffusely reflective inner surface and a transparent refractive hollow dome-shaped member. The transparent refractive hollow dome-shaped member has a proximal end arranged in contact with the conical reflector and a top arranged at a distance from the conical reflector. The top has an opening, and the transparent refractive hollow dome-shaped member is manufactured by means of fused deposition modeling (FDM) using a transparent polymer material as a printing material.

[0013] By the combination of a conical reflector having a diffusely reflective inner surface and a transparent refractive hollow dome-shaped member, an optical component is provided that can provide an intensity gain, particularly from a light source in a forward direction outward from the light source. In addition, an open top provided in a top portion of the optical component can provide a beam shaping effect, particularly in the forward direction from the light source mentioned above. The top portion is adjacent to the open top and therefore adjacent to the opening. The bottom is adjacent to the conical reflector having a diffusely reflective inner surface and is also adjacent to the light source. A cost-effective component can also be provided by using a transparent polymer material as a printing material by means of fused deposition modeling (FDM).

[0014] According to one embodiment, the above-mentioned conical reflector is manufactured by means of fused deposition modeling using a reflective thermoplastic polymer material as a further printing material. The above-mentioned transparent thermoplastic polymer material as a printing material may provide effects such as rib-like structures.

[0015] According to one embodiment, the transparent refractive hollow dome-shaped member is a layer-by-layer structure, wherein each layer has a layer thickness and a layer width. The ratio of layer thickness to layer width may preferably be in the range of 0.8-0.3. In the layer-by-layer structure, each layer may be deposited (or printed) on a previous, preceding deposited layer. In addition, when deposited, each deposited layer may have a variation in layer thickness and a variation in layer width. Therefore, the ratio of layer thickness to layer width provided may vary. With a specific layer thickness to layer width ratio in the range of 0.8-0.3, the material of the transparent refractive hollow dome-shaped member may provide improved sharpness and strength gain of the center strength.

[0016] According to one embodiment, the transparent refractive hollow dome-shaped member has a ribbed surface texture. The ribbed structure can be located on the inner side and / or the outer side of the dome-shaped member. Through the layer-by-layer structure provided by fused deposition modeling (FDM) and the transparent polymer material as the printing material, a transparent refractive hollow dome-shaped member with a characteristic ribbed surface texture can be provided. By printing the above-mentioned characteristic ribbed surface texture of the transparent polymer material, when set on the light source, an intensity gain can be provided in the optical component. The light source can be a Lambertian light source.

[0017] According to one embodiment, the transparent refractive hollow dome-shaped member is conical and has a cross section that is circular, or polygonal, or a combination of circular and polygonal. In the context of the present disclosure, polygonal can be understood as triangle, rectangle, pentagon, hexagon, heptagon, octagon, etc. The conical transparent refractive hollow dome-shaped member can be truncated, for example to form an open top. Other appearances that may be suitable for corresponding conical reflectors are also possible. All of these mentioned appearances can be particularly helpful to improve beam shaping capabilities.

[0018] According to one embodiment, the ratio of the height to the width of the transparent refractive hollow dome-shaped member is in the range of 0.4 to 1.0. By means of the above ratio, the light distribution can be influenced. When arranged on a light source, an optical component including a transparent refractive hollow dome-shaped member can provide a specific light distribution and beam shaping.

[0019] According to one embodiment, the side angle of the transparent refractive hollow dome-shaped member relative to the longitudinal center axis of the above-mentioned transparent refractive hollow dome-shaped member is in the range of 20°-50°. Depending on the steepness of the protrusion of the appearance of the above-mentioned transparent refractive hollow dome-shaped member, the side angles of at least five printed lines, preferably at least the first ten lines, calculated from the top of the top part, may also be in the range of 20°-50°.

[0020] Preferably, the side angle may be between the longitudinal center axis of the transparent refractive hollow dome-shaped member and the outer side wall of the transparent refractive hollow dome-shaped member. The side angle of the above side angle range achieved in the transparent refractive hollow dome-shaped member in the optical assembly may provide a beam shaping effect. In particular, the combination of the above side angle in the above 20°-50° range and the above layer thickness to layer width ratio in the range of 0.8-0.3 may be advantageous in achieving sharpness of the center intensity of the beam shape and may provide an intensity gain.

[0021] To increase the spot strength of the optical component (spot strength refers to the degree to which a light beam spreads out over a surface), the transparent refractive hollow dome-shaped member may be provided with a reduced side angle and an increased layer thickness to layer width ratio.

[0022] According to one embodiment, the side angle of the transparent refractive hollow dome shaped member relative to the longitudinal center axis of said transparent refractive hollow dome shaped member is substantially non-constant.

[0023] The side walls of the transparent refractive hollow dome-shaped member may have non-constant alternation. For example, the wall may have a steeper curvature from the top to the proximal bottom end, resulting in a more rectangular appearance of the transparent refractive hollow dome-shaped member. Alternatively, the wall may have a more convex curvature from the top to the proximal bottom end, resulting in a more rounded appearance of the transparent refractive hollow dome-shaped member.

[0024] The sidewalls may be substantially constant or straight between two or more layers in the layer-by-layer structure, which means that the gradient is zero, corresponding to a substantially linear printing direction in a fused deposition modeling (FDM) process of the transparent refractive hollow dome-shaped member. In a corresponding manner, the sidewalls may be non-constant, may substantially have a curvature, for example, may have a positive or negative gradient in the printing direction between two or more layers in the layer-by-layer structure in a fused deposition modeling (FDM) process.

[0025] According to one embodiment, the opening of the top is adapted to provide a beam angle range of 15°-40°, preferably 20°-35°. Thus, by means of the above-mentioned opening, the light beam has a corresponding angle range adapted to pass through the above-mentioned opening without interacting with the above-mentioned transparent refractive hollow dome-shaped member. By changing the opening size of the above-mentioned opening of the top, the light beam has a changed corresponding angle range adapted to pass through the above-mentioned opening without interacting with the above-mentioned transparent refractive hollow dome-shaped member. Thus, a beam shaping effect can be provided.

[0026] According to a second aspect of the invention, there is provided a luminaire comprising a light source and an optical assembly as described above. A conical reflector having a diffusely reflective inner surface is arranged to receive light provided by the light source, and wherein the top of the transparent refractive hollow dome-shaped member faces away from the light source. By means of the above combined optical assembly arranged on the light source, the luminaire can provide a combination of beam shaping effects and intensity gain, particularly in a forward direction outward from the light source.

[0027] According to one embodiment, a first portion of the output of the light source corresponding to the light beam of the first angular range is adapted to be provided from an opening in the above-mentioned top of the transparent refractive hollow dome-shaped member without interacting with the above-mentioned transparent refractive hollow dome-shaped member. The above-mentioned lack of interaction can be a lack of light refraction by the light-transmitting printed material. The first portion of the output of the light source can correspond to the light beam of the first angular range, which can be in the range of 15°-40°, preferably in the range of 20°-35°. By the first portion of the output of the light source, the luminaire can in particular provide a beam shaping effect.

[0028] According to one embodiment, a second portion of the output of the light source corresponding to the light beam of the second angular range is adapted to interact with the transparent refractive hollow dome-shaped member, be redirected to a smaller angle, and / or be redirected back toward the light source. The above interaction can be a refraction of light from the light-transmitting printed material using the transparent refractive hollow dome-shaped member. Such an embodiment provides the advantage of providing an intensity gain in the forward direction from the light source. The second portion of the output of the light source can correspond to a light beam of the second angular range, which can be in the range of 40°-70°. By the second portion of the output of the light source, the lamp can particularly provide an intensity gain.

[0029] According to one embodiment, in the lamp, a portion of the light from the light source is collimated into collimated light by a conical reflector having a diffusely reflective inner surface, and a portion of the collimated light is refracted by a transparent refractive hollow dome-shaped member, and a portion of the collimated light is emitted from the opening without interacting with the above-mentioned conical reflector having a diffusely reflective inner surface.

[0030] Advantageously, the combined luminaire can provide a large amount of collimation, which can provide minimal beam spread as the beam propagates.

[0031] According to a third aspect of the present invention, there is provided a method for manufacturing an optical component for beam shaping. As described above, the optical component comprises a conical reflector having a diffusely reflective inner surface, provided with a transparent refractive hollow dome-shaped member having an open top.

[0032] The method of the present invention comprises the steps of manufacturing a transparent refractive hollow dome-shaped member by means of fused deposition modeling (FDM) using a transparent polymer material as a printing material.

[0033] With this approach, optical components for beam shaping, particularly in the forward direction from the light source, can be accurately and cost-effectively manufactured.

[0034] According to one embodiment, the method of the present disclosure further comprises the step of manufacturing the conical reflector by means of fused deposition modeling (FDM) using a reflective thermoplastic polymer material as a further printing material.

[0035] Typically, the two components can be printed at once in one printing operation, i.e., the transparent refractive hollow dome-shaped member can then be printed on the diffuse reflector that was printed first. Alternatively, the diffuse reflector can then be printed on the transparent refractive hollow dome-shaped member that was printed first. Alternatively, the method may include the step of connecting the diffuse reflector to the above-mentioned transparent refractive hollow dome-shaped member. The method may include the additional step of attaching the proximal end of the transparent refractive hollow dome-shaped member to the upper end of the diffuse reflector. The method may include additional method steps and / or details thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be described in more detail below with reference to the accompanying drawings, in which:

[0037] Figure 1 1 shows a front view of an optical assembly for beam shaping according to one embodiment of the present invention,

[0038] Figure 2 Three examples of transparent refractive hollow dome-shaped members according to three embodiments of the present invention are shown,

[0039] Figure 3A flow chart showing a method for manufacturing an optical component for beam shaping according to an embodiment of the present invention, and

[0040] Figure 4a and Figure 4b Polar coordinate light intensity diagrams are shown respectively. DETAILED DESCRIPTION

[0041] The present invention will be described more fully below with reference to the accompanying drawings, in which preferred embodiments of the present invention are shown. However, the present invention may be embodied in many different forms and should not be construed as being limited to the embodiments described herein; rather, these embodiments are provided to make this disclosure thorough and complete and to fully convey the scope of the present invention to those skilled in the art. In the accompanying drawings, like numbers represent like elements.

[0042] Figure 1 a shows a schematic diagram of an optical component 100 according to an embodiment. The optical component 100 includes a conical reflector 101 and a transparent refractive hollow dome-shaped member 102. The conical reflector 101 has a diffusely reflective inner surface. The above-mentioned inner surface can be covered with a reflective material, such as aluminum or paint. In an embodiment, the reflectivity is preferably at least 80%, more preferably at least 85%, and most preferably at least 88%. In addition, in an embodiment, the maximum diameter of the conical reflector 101 can be at least 20 mm, preferably at least 30 mm, more preferably at least 40 mm, and most preferably at least 50 mm. In the following, the conical reflector 101 according to the above is referred to as a "diffuse reflector" 101.

[0043] In addition, the transparent refractive hollow dome-shaped member 102 has a proximal end 103 arranged in contact with the diffuse reflector 101 and a top 104 arranged at a distance from the diffuse reflector 101 , and the top 104 has an opening 105 .

[0044] The transparent refractive hollow dome-shaped member 102 is provided with the above-mentioned open top 105 for beam shaping the light output from the optical assembly 100. The size of the opening 105 of the open top 104 is adapted to provide the desired angular range α of the light beam. In this way, the desired beam shaping effect can be obtained. In an embodiment, the diameter of the opening 105 can be at least 5 mm, preferably at least 10 mm, more preferably at least 15 mm, and most preferably at least 20 mm.

[0045] The transparent refractive hollow dome-shaped member 102 is manufactured by means of an additive manufacturing process such as fused deposition modeling (FDM) using a transparent polymer material as a printing material, which involves a layer-by-layer structure 108 obtained by laying down the printing material in layers 102a, 102b, see Figure 1For example, the wire may be unwound from a coil and supplied to produce at least a portion of the layers 102a, 102b of transparent polymer material deposited on each other to form a characteristic ribbed structure or surface texture 108. Each layer 102a of transparent polymer material may be preferably positioned and preferably deposited over a previous preceding layer 102b. In an embodiment, the ribbed surface texture of the transparent refractive hollow dome-shaped member 102 may include at least 10 ribs.

[0046] In more detail, each layer 102a, 102b has a layer thickness ΔL and a layer width L. In an embodiment, the layer thickness ΔL may be in the range of 0.3 mm to 3 mm, and the layer width L may be in the range of 0.4 mm to 4 mm. Then, the ratio of the layer thickness to the layer width ΔL / L is preferably in the range of 0.8-0.3 to optimize the sharpness of the center intensity, which contributes to the intensity gain of the optical component 10. The layer width L may be substantially the same as the nozzle diameter of the FDM-based manufacturing component. In an embodiment, the maximum diameter of the transparent refractive hollow dome-shaped member 102 may be at least 20 mm, preferably at least 30 mm, more preferably at least 40 mm, and most preferably at least 50 mm.

[0047] Figure 1 Further shown is the side angle θ of the transparent refractive hollow dome-shaped member 102, which is preferably in the range of 20°-50° to obtain desired concentration and beam shaping.

[0048] To shape the appearance and beam shaping capability of the transparent refractive hollow dome-shaped member 102, the side walls 103, 104 implemented in the transparent refractive hollow dome-shaped member 102 associated with the above-mentioned side angle θ relative to the longitudinal center axis can be substantially constantly alternating from the top 104 to the proximal end 103 (i.e., the bottom) so that the gradient This corresponds to a substantially straight printing direction of the transparent refractive hollow dome-shaped member 102 during the additive manufacturing process. Alternatively, the walls 103, 104 may also be non-constantly alternating. For example, the walls 103, 104 may have a steeper curvature from the top 104 to the proximal bottom 103 end, resulting in a more rectangular appearance of the transparent refractive hollow dome-shaped member 102. Alternatively, the walls 103, 104 may have a more convex curvature from the top 104 to the proximal bottom 103 end, resulting in a more rounded appearance of the transparent refractive hollow dome-shaped member 102. The curvature may be composed of a positive gradient of + or negative gradient - The positive gradient corresponds to a substantially positive tilt or curvature in the printing direction during the additive manufacturing of the transparent refractive hollow dome-shaped member 102, and the negative gradient corresponds to a substantially negative tilt or curvature in the printing direction during the additive manufacturing of the transparent refractive hollow dome-shaped member 102. In this way, by combining a zero gradient with a positive gradient and / or a negative gradient, respectively, in a layer-by-layer structure, the appearance and beam shaping capability can be optimized, as shown below.

[0049] Figure 2 Three embodiments "a", "b", and "c" of transparent refractive hollow dome-shaped members 102 for forming different beam shapes are shown respectively, all of which are manufactured by means of fused deposition modeling (FDM) using transparent polymer materials as printing materials. In example "a", the transparent refractive hollow dome-shaped member 102 has a flatter appearance, and the ratio h / w of height (h) to width (w) is about 0.4. In example "b", the transparent refractive hollow dome-shaped member 102 has a more pointed and rectangular appearance, and the corresponding ratio h / w is about 1.0. In example "c", the transparent refractive hollow dome-shaped member 102 has a more rounded and bulky appearance, and the corresponding ratio h / w is about 0.7.

[0050] In order to increase the spot intensity of the optical component 100 (the spot intensity refers to the degree of diffusion of the light beam on the surface), the transparent refractive hollow dome-shaped member 102 is respectively provided with a reduced side angle θ and an increased layer thickness to layer width ratio ΔL / L relative to the longitudinal center axis of the transparent refractive hollow dome-shaped member 102. Therefore, "b" can provide the optimal spot intensity of examples "a", "b" and "c".

[0051] The transparent refractive hollow dome-shaped member 102 may also be substantially conical. The conical transparent refractive hollow dome-shaped member 102 may be truncated to form an open top 105.

[0052] Preferably, the transparent refractive hollow dome-shaped member 102 and the diffuse-shaped reflector 101 may be connected at their respective bases in a geometric perspective.

[0053] In order to obtain the combined optical assembly 100, the diffuse reflector 101 and the transparent refractive hollow dome-shaped member 102 are preferably connected to each other at the proximal end 103 of the transparent refractive hollow dome-shaped member 102 and the upper end of the diffuse reflector 101. Alternatively, as part of the manufacturing process described later, the transparent refractive hollow dome-shaped member 102 can be arranged on the diffuse reflector 101, for example connected to the upper edge of the diffuse reflector 101.

[0054] A luminaire 10 may be provided, comprising a light source 106 and the above optical assembly 100 for beam shaping implemented according to the above, wherein a diffuse reflector 101 is arranged to receive light provided by the light source 106, and wherein a top 104 of a transparent refractive hollow dome-shaped member 102 faces away from the light source 106. The luminaire 10 comprises the optical assembly 100 arranged on the light source 106. The light source 106 may be a Lambertian light source 106, such as a chip on board (COB) or the like.

[0055] Figure 1 Also shown is a first portion of the output of the light source 106 of the luminaire 10, which may correspond to a light beam of a first angular range α, which is adapted to be provided from the opening 105 of the top 104 of the transparent refractive hollow dome-shaped member 102 without interacting and refracting with the aforementioned transparent refractive hollow dome-shaped member 102. The first angular range α is preferably in the angular range of 20°-35°. In addition, a second portion of the output of the light source 106 of the luminaire 10 is also shown, which may correspond to a light beam of a second angular range β, which is adapted to interact and refract with the transparent refractive hollow dome-shaped member 102, thereafter being redirected to a smaller angle, and / or being redirected back toward the light source 106. The second angular range β is preferably in the range of 40°-70°.

[0056] In the manner described, the luminaire 10 includes an optical assembly 100 for beam shaping that provides a beam shape with an intensity gain, particularly in a forward direction from the light source.

[0057] A method 200 for manufacturing the optical assembly 100 according to the above will be described below.

[0058] Figure 3 One embodiment of a method for manufacturing an optical component 100 for beam shaping comprising a conical reflector 101 having a diffusely reflective inner surface provided with a transparent refractive hollow dome-shaped member 102 having an open top 105 is shown.

[0059] The method comprises a step 200 of manufacturing a transparent refractive hollow dome-shaped member 102 by means of fused deposition modeling (FDM) using a transparent polymer material as a printing material.

[0060] The method may comprise the further step 210 of providing a diffuse shaped reflector 101. The method may comprise the further step of depositing the layer-by-layer structure directly on the diffuse shaped reflector 101. Typically, both components are printed at once in one printing operation, i.e. the transparent refractive hollow dome shaped member 102 is subsequently printed on the first printed diffuse shaped reflector 101. Alternatively, the diffuse shaped reflector 101 is subsequently printed on the first printed transparent refractive hollow dome shaped member 102.

[0061] Figure 4a and Figure 4b A polar light intensity diagram, ie a polar diagram of the luminous intensity (candela) as a function of the angle, is respectively shown.

[0062] Each polar plot belongs to Figure 1 A lighting device of the type shown includes a light source and an optical component, wherein the optical component has (i) a conical reflector having a diffusely reflective inner surface, arranged to receive light emitted by the light source, and (ii) a transparent refractive hollow dome-shaped member, wherein the transparent refractive hollow dome-shaped member has a proximal end arranged in contact with the conical reflector and a top arranged at a distance from the conical reflector, the top facing away from the light source, and wherein the top has an opening.

[0063] Figure 4a and Figure 4b The angles in the graph of are measured relative to the longitudinal center axis of the lighting device, which is at Figure 1 Also shown is the axis for measuring the side angle θ of the dome-shaped member 102 .

[0064] The angle of 180 degrees corresponds to a direction parallel to the longitudinal center axis of the lighting device and from the light source towards the opening at the top of the dome-shaped member.

[0065] for Figure 4a , both the conical reflector and the transparent refractive hollow dome-shaped member have smooth surfaces.

[0066] for Figure 4b , the conical reflector has a smooth surface, and the transparent refractive hollow dome-shaped member is manufactured by fused deposition modeling using a transparent thermoplastic polymer material as a printing material.

[0067] In other words, Figure 4a and Figure 4b The difference between the graphs of is that the former belongs to a lighting device having an optical component whose inner and outer sides of a transparent refractive hollow dome-shaped member are smooth, while the latter belongs to a lighting device having an optical component whose inner and outer sides of a transparent refractive hollow dome-shaped member have ribbed surface textures.

[0068] By comparison Figure 4a and Figure 4b As can be seen from the graph, the above-mentioned difference between the two lighting devices results in the maximum luminous intensity increasing from about 42 candelas to about 96 candelas.

[0069] In other words, for the above-mentioned lighting device, a forward intensity gain of about 2.3 times can be obtained by using a dome-shaped member having ribbed surface textures on the inner and outer sides instead of a dome-shaped member having smooth inner and outer sides.

[0070] In the drawings and specification, preferred embodiments and examples of the present invention have been disclosed, and although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being set forth in the following claims.

Claims

1. An optical component (100) for beam shaping, comprising: - a conical reflector (101) having a diffusely reflecting inner surface, - a transparent refractive hollow dome-shaped member (102), wherein the transparent refractive hollow dome-shaped member (102) has a proximal end (103) and a top (104), wherein the proximal end is arranged in contact with the conical reflector (101), and the top is arranged at a distance from the conical reflector (101), wherein the top (104) has an opening (105); and - wherein the transparent refractive hollow dome-shaped member (102) is manufactured by means of fused deposition modeling (FDM) using a transparent thermoplastic polymer material as a printing material, so that the transparent refractive hollow dome-shaped member (102) has a ribbed surface texture (108) on the inner side and / or the outer side of the transparent refractive hollow dome-shaped member (102).

2. The optical component (100) according to claim 1, wherein the conical reflector (101) is manufactured by means of fused deposition modeling (FDM) using a reflective thermoplastic polymer material as an additional printing material.

3. An optical component (100) according to any one of the preceding claims, wherein the transparent refractive hollow dome-shaped member (102) is a layer-by-layer structure (102a, 102b, 108), wherein each layer (102a, 102b) has a layer thickness (ΔL) and a layer width (L), whereby the ratio of the layer thickness to the layer width (ΔL / L) is in the range of 0.8 to 0.

3.

4. The optical component (100) according to any one of the preceding claims, wherein the transparent refractive hollow dome-shaped member (102) is conical and has a cross-section that is circular, or polygonal, or a combination of circular and polygonal.

5. The optical component (100) according to any one of the preceding claims, wherein a ratio (h / w) of the height (h) to the width (w) of the transparent refractive hollow dome-shaped member is in the range of 0.4 to 1.

0.

6. An optical component (100) according to any one of the preceding claims, wherein a side angle (θ) of [the top portion of] the transparent refractive hollow dome-shaped member (102) relative to a longitudinal center axis of the transparent refractive hollow dome-shaped member (102) is in the range of 20° to 50°.

7. The optical component (100) according to any one of the preceding claims, wherein the side angle (θ) of the transparent refractive hollow dome-shaped member (102) relative to the longitudinal center axis of the transparent refractive hollow dome-shaped member (102) is substantially non-constant.

8. The optical component (100) according to any one of the preceding claims, the opening (105) of the top portion (104) being adapted to provide an angular range (α) of the light beam of 20° to 35°.

9. A lamp (10) comprising a light source (106) providing light source light and an optical component (10) according to any one of claims 1 to 8, wherein the conical reflector (101) has a diffusely reflective inner surface and is arranged to receive light emitted by the light source (106), and wherein the top (104) of the transparent refractive hollow dome-shaped member (102) faces away from the light source (106).

10. The lamp (10) according to claim 9, wherein a first portion of the light source light (000) provided by the light source (106) is suitable for being provided from the opening (105) of the top (104) of the transparent refractive hollow dome-shaped member (102) without interacting with the transparent refractive hollow dome-shaped member (102), the first portion corresponding to a light beam of a first angular range (α).

11. A lamp according to any one of claims 9 and 10, wherein a second portion of the light source light (000) emitted by the light source (106) is suitable for interacting with the transparent refractive hollow dome-shaped member (102) to be redirected to a smaller angle and / or redirected back to the light source (106), the second portion corresponding to a light beam of a second angular range (β).

12. The lamp according to claim 9, wherein a portion of the light from the light source (106) is collimated into collimated light by the conical reflector (101) having a diffusely reflective inner surface, and a portion of the collimated light is refracted by the transparent refractive hollow dome-shaped member (102), and a portion of the collimated light is emitted from the opening (105) without interacting with the conical reflector (101) having a diffusely reflective inner surface.

13. A method for manufacturing an optical component (100) for beam shaping, the optical component comprising a conical reflector (101), provided with a transparent refractive hollow dome-shaped member (102), the conical reflector having a diffusely reflective inner surface, the transparent refractive hollow dome-shaped member having an open top (105), The method comprises the step (200) of manufacturing the transparent refractive hollow dome-shaped member (102) by means of fused deposition modeling (FDM) using a transparent thermoplastic polymer material as a printing material, so that the transparent refractive hollow dome-shaped member (102) has a ribbed surface texture (108) on the inner side and / or the outer side of the transparent refractive hollow dome-shaped member (102).

14. The method according to claim 13, wherein the method comprises the further step (210) of manufacturing the conical reflector (101) by means of fused deposition modeling (FDM) using a reflective thermoplastic polymer material as a further printing material.

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