Abstract: Printer head (501) for a 3D printer, the printer head (501) comprising n distribution elements (510), wherein n?2, a combination chamber (520), and a printer nozzle (502), wherein the combination chamber (520) is configured downstream of the distribution elements (510) and upstream of the printer nozzle (502), wherein each distribution element (510) comprise a flow-through chamber (511) with an inlet (512) and a plurality of k outlets (513) to the combination chamber (520), wherein k?4, wherein the outlets (513) of the distribution elements (510) are configured such that a plurality of outlets (513) of a distribution element (510) have outlets (513) of another distribution element (510) as nearest neighbors.

Abstract: A body (10) is disclosed for obscuring a light source arrangement (3). The body comprises a surface (20) including a plurality of optically reflective relief structures (30, 30?, 30?), each relief structure comprising a first portion (31) and a second portion (33) adjacent to said first portion extending from said surface, wherein the first portion has a different optical reflectivity to the second portion and neighboring optically reflective relief structures are separated by an optically transparent medium contacting said neighboring optically reflective relief structures. Also disclosed is a luminaire comprising such a body and a method of manufacturing such a body.

Abstract: It is an object of the invention to provide an improved method of 3D-printing producing a component for use in a lighting device. Thereto, the invention provides a method of 3D-printing producing a component for use in a lighting device, the component comprising a flexible substrate having a stiffness and a polymer material or a monomer material, the method comprising printing the polymer material or the monomer material onto the flexible substrate in a printing structure; wherein the printing structure causes the flexible substrate to change into a second shape when the polymer material or the monomer material shrinks after printing; wherein an internal stress in the polymer material or the monomer material exerts a bending force on a surface area of the flexible substrate, wherein the bending force forces a displacement of the flexible substrate into the second shape.

Abstract: The invention provides lighting device (1000) configured to provide a beam of lighting device light (1001), the lighting device (1000) comprising: (a) a light transmissive window (100) having a first window side (101) and a second window side (102); (b) a reflector (200) comprising a reflector cavity (210), the reflector cavity (210) comprising a first reflector cavity side (201), a reflector cavity exit side (202), a reflector cavity wall (205) bridging said first reflector cavity side (201) and said reflector cavity exit side (202); wherein the reflector cavity wall (205) comprises a light reflective material (206), wherein the recavity wall (205) comprises a 3D-printed cavity wall (1205); wherein at least part of the first window side (101) is configured as reflector cavity exit window (220) at the reflector cavity exit side (202); (c) a light source (10) configured at the first reflector cavity side (201) and configured to provide light source light (11) within said reflector cavity (210); and (d) a beam

Abstract: An optical component is disclosed including a plurality of layers, each layer comprising a first region in between a second region and a third region, the first region having a lower transmissivity than the second and third regions, wherein the layers are staggered such that the optical component comprises at least one passage defined by partially overlapping regions of higher transmissivity. A luminaire including such an optical component and a 3-D printing method for manufacturing such a component are also disclosed.

Abstract: An optical component (10) is disclosed comprising a plurality of layers (11), each layer comprising a core portion (13) and a shell portion (15) enveloping the core portion, wherein the core portion is made of a first material and the shell portion is made of a second material, the first material and the second material having a different transmissivity. Also disclosed are a luminaire comprising such an optical component and a method of manufacturing such an optical component.

Abstract: The invention relates to a method for producing a radiation detector used to detect ionizing radiation including a first inorganic-organic halide Perovskite material (24) as a direct converter material and/or as a scintillator material in a detector layer and to a radiation detector comprising a detector layer (24) produced by means of the steps of the method. In order to provide an approach for producing a thick layer (e.g. above 10 ???) of Perovskite material suitable for a radiation detector, it is proposed to grow the material selectively on a seeding layer (23), yielding in a thick polycrystalline layer. One suitable seeding layer (23) to grow lead Perovskite material is made of a bromide Perovskite material.

Abstract: The invention provides a method for manufacturing a 3D item (1) by means of 3D printing. The method comprises the step of depositing, during a printing stage, 3D printable material (201) to provide 3D printed material (202), wherein the 3D printable material (201) comprises a core-shell filament (320) comprising (i) a core (321) comprising a core material (1321) having one or more of a core glass temperature Tg1 and a core melting temperature Tm1 and (ii) a shell (322) comprising a shell material (1322) having one or more of a shell glass temperature Tg2 and a shell melting temperature Tm2, wherein one or more of the shell glass temperature Tg2 and the shell melting temperature Tm2 is lower than one or more of the core glass temperature Tg1 and the core melting temperature Tm1.

Abstract: The invention provides a method comprising 3D printing a 3D item, the method comprising depositing during a printing stage 3D printable material and an optical fiber, to provide the 3D item with the optical fiber at least partly embedded in 3D printed material, wherein the 3D printable material during at least part of the printing stage comprises a light transmissive material, the method further comprising providing during the printing stage a light escape part comprising 3D printed material comprising the light transmissive material, where visible light propagating through the optical fiber can escape from the optical fiber via the 3D printed material comprised by the light escape part to external of the 3D item.

Abstract: An optical component (100) is disclosed comprising a plurality of layers (130), each layer comprising a first region in between a second region and a third region, the first region having a lower transmissivity than the second and third regions, wherein the layers are staggered such that the optical component comprises at least one passage defined by partially overlapping regions of higher transmissivity. A luminaire including such an optical component and a 3-D printing method for manufacturing such a component are also disclosed.

Abstract: The invention provides a lighting device including a light source configured to generate light source light and a light converter configured to convert at least part of the light source light into visible converter light. The light converter includes a matrix containing a luminescent material based on derivatives of benzimidazoxanthenoisoquinolinone. The lighting device may include a further luminescent material.

Abstract: The invention provides a reflector (2) comprising a reflector wall (20), the reflector wall (20) comprising a first wall surface (22) and a second wall surface (23) defining said reflector wall (20), the reflector wall (20) comprising a light transmissive material (21), wherein the reflector wall (20) has a first dimension (d1) and a second dimension (d2) defining a first reflector wall area, wherein each wall surface (22,23) comprises a plurality of parallel arranged elongated corrugations (210), wherein the corrugations have corrugation heights (h2) relative to recesses (220) between adjacent corrugations (210) and corrugation widths (w2) defined by the distance between adjacent recesses (220) at the respective wall surfaces (22,23), wherein the corrugations (210) have curved corrugation surfaces (230) between said adjacent recesses (220) having corrugation radii (r2) at the respective wall surfaces (22,23), and wherein over at least part of one of the first dimension (d1) and the second dimension (d2) one

Abstract: The present invention relates to a lighting device (100) to stimulate plant growth and bio-rhythm of a plant. The lighting device (100) comprising a solid state light source (102) arranged to emit direct red light having a wavelength of 600 to 680 nm, preferably 640 to 680 nm, and a wavelength converting member (106) arranged to receive at least part of said direct red light emitted from said solid state light source (102) and to convert said received direct red light to far-red light having a maximum emission wavelength of 700 to 760 nm, preferably 720 to 760 nm.

Abstract: The invention provides lighting device (1000) configured to provide a beam of lighting device light (1001), the lighting device (1000) comprising: (a) a light transmissive window (100) having a first window side (101) and a second window side (102); (b) a reflector (200) comprising a reflector cavity (210), the reflector cavity (210) comprising a first reflector cavity side (201), a reflector cavity exit side (202), a reflector cavity wall (205) bridging said first reflector cavity side (201) and said reflector cavity exit side (202); wherein the reflector cavity wall (205) comprises a light reflective material (206), wherein the recavity wall (205) comprises a 3D-printed cavity wall (1205); wherein at least part of the first window side (101) is configured as reflector cavity exit window (220) at the reflector cavity exit side (202); (c) a light source (10) configured at the first reflector cavity side (201) and configured to provide light source light (11) within said reflector cavity (210); and (d) a beam

Abstract: The invention provides a method for enhancing the nutritional value in a first plant part (2) of a crop (1), wherein the first plant part (2) comprises an edible plant part, wherein the crop (1) in addition to the first plant part (2) comprises one or more other plant parts (3), wherein the method comprises illuminating during a nutritional enhancement lighting period a target part (5) of said first plant part (2) with horticulture light (511) that is selected to enhance formation of a nutrient in said first plant part (2) while allowing one or more other plant parts (3) to be subjected to different light conditions, wherein the nutritional enhancement lighting period is started within two weeks from harvest of the first plant part (2).

Abstract: A method for producing a light transmissive optical component (10) is disclosed. The method comprises 3D printing a stack (1) of at least two layers (2). Each layer (2) is a biconvex cylinder lens having an optical axis (OA) perpendicular to a stacking direction (S) of the stack (1).

Abstract: The invention relates to a method for producing a radiation detector used to detect ionizing radiation including a first inorganic-organic halide Perovskite material (24) as a direct converter material and/or as a scintillator material in a detector layer and to a radiation detector comprising a detector layer (24) produced by means of the steps of the method. In order to provide an approach for producing a thick layer (e.g. above 10 ???) of Perovskite material suitable for a radiation detector, it is proposed to grow the material selectively on a seeding layer (23), yielding in a thick polycrystalline layer. One suitable seeding layer (23) to grow lead Perovskite material is made of a bromide Perovskite material.

Abstract: The present invention relates to thermally conductive composite materials comprising an ultrahigh molecular weight (UHMW) polymer and a filler material in an amount of greater than about 60 wt % and uses thereof, including in fused deposition modeling and 3-D printing for making articles. The invention also relates to making the composite materials in solution. The composite materials possess desirable thermal conductivity and at least acceptable physical and/or mechanical properties.

Abstract: The invention provides a method comprising 3D printing a 3D item, the method comprising depositing during a printing stage 3D printable material and an optical fiber, to provide the 3D item with the optical fiber at least partly embedded in 3D printed material, wherein the 3D printable material during at least part of the printing stage comprises a light transmissive material, the method further comprising providing during the printing stage a light escape part comprising 3D printed material comprising the light transmissive material, where visible light propagating through the optical fiber can escape from the optical fiber via the 3D printed material comprised by the light escape part to external of the 3D item.

Abstract: The invention provides a lighting device (1) comprising (a) a light source (10) configured to generate light source light (11), and (b) a light converter (100) configured to convert at least part of the light source light (11) into visible converter light (111), wherein the light converter (100) comprises a matrix (120) containing a luminescent material (140) based on derivatives of benzimidazoxanthenoisoquinolinone. The lighting device may further comprise a further luminescent material (130).