Abstract: A printer unit (100) for a 3D-printing apparatus. The printer unit comprises a printer head (105) comprising a nozzle (110) arranged to deposit printing material from the printer unit, a pressure sensor (120) configured to sense a pressure exerted on the printer head from the printing material, and a control unit (130) coupled to the pressure sensor. The control unit is configured to control the speed of the printer head based on a transfer function from the pressure sensed by the pressure sensor to a desired speed of the printer head, in order to maintain a constant deposition of the amount of printing material per length unit of deposited printing material.

Abstract: A printer head (200, 300, 400) for a 3D-printing apparatus, comprising a nozzle (210, 310, 450) arranged to deposit one or more adjacently arranged filaments of printing material to form at least one layer of an object to be produced. The nozzle comprises at least one exterior surface (220) configured to be brought into abutting contact with a peripheral edge (280) of the at least one layer, and configured to be guided along the peripheral edge of the at least one layer and on a predetermined distance into the at least one layer.

Abstract: A printer head (200, 300, 400) for a 3D-printing apparatus, comprising a nozzle (210, 310, 450) arranged to deposit one or more adjacently arranged filaments of printing material to form at least one layer of an object to be produced. The nozzle comprises at least one exterior surface (220) configured to be brought into abutting contact with a peripheral edge (280) of the at least one layer, and configured to be guided along the peripheral edge of the at least one layer and on a predetermined distance into the at least one layer.

Abstract: A luminaire is disclosed comprising an optical stack (200) transparent to radio waves, the optical stack comprising a first surface (210) including a light exit window (211) and a further surface (220) opposing the first surface, the optical stack including a planar light guide (300) having a first major surface facing or defining the first surface, an opposing second major surface facing or defining the further surface and at least one edge surface (310) extending between said opposing first and second major surfaces; and a frame (700) around the optical stack, the frame carrying at least one light source (100) optically coupled to one or more of said edge surfaces of the light guide, wherein the frame delimits the light exit window and an exposed portion (221) of the further surface opposing the light exit window, said light exit window and the exposed portion delimiting a conduit (230) for said radio waves through the optical stack.

Abstract: A printer unit (100) for a 3D-printing apparatus for deposition of a printing material, as well as a method of 3D printing, is provided. The printer unit comprises a printer head (105) comprising a nozzle (110). The printer head is resiliently suspended in the printer unit in a vertical direction by at least one resilient means (120), allowing a vertical movement of the printer head during deposition of the printing material. The suspended printer head in its equilibrium is positionable above the underlying material at a vertical distance (?z1) before deposition. During deposition of printing material, the at least one resilient means is configured to become biased by a vertical force (F3) on the nozzle from the printing material on the underlying material, such that the printer head moves from its equilibrium into a position at a desired vertical distance (?z1) from the underlying material.

Abstract: A luminaire is disclosed comprising an optical stack (200) transparent to radio waves, the optical stack comprising a first surface (210) including a light exit window (211) and a further surface (220) opposing the first surface, the optical stack including a planar light guide (300) having a first major surface facing or defining the first surface, an opposing second major surface facing or defining the further surface and at least one edge surface (310) extending between said opposing first and second major surfaces; and a frame (700) around the optical stack, the frame carrying at least one light source (100) optically coupled to one or more of said edge surfaces of the light guide, wherein the frame delimits the light exit window and an exposed portion (221) of the further surface opposing the light exit window, said light exit window and the exposed portion delimiting a conduit (230) for said radio waves through the optical stack.

Abstract: A printer unit (100) for a 3D-printing apparatus. The printer unit comprises a printer head (105) comprising a nozzle (110) arranged to deposit printing material from the printer unit, a pressure sensor (120) configured to sense a pressure exerted on the printer head from the printing material, and a control unit (130) coupled to the pressure sensor. The control unit is configured to control the speed of the printer head based on a transfer function from the pressure sensed by the pressure sensor to a desired speed of the printer head, in order to maintain a constant deposition of the amount of printing material per length unit of deposited printing material.

Abstract: A printer unit (100) for a 3D-printing apparatus for deposition of a printing material, as well as a method of 3D printing, is provided. The printer unit comprises a printer head (105) comprising a nozzle (110). The printer head is resiliently suspended in the printer unit in a vertical direction by at least one resilient means (120), allowing a vertical movement of the printer head during deposition of the printing material. The suspended printer head in its equilibrium is positionable above the underlying material at a vertical distance (?z1) before deposition. During deposition of printing material, the at least one resilient means is configured to become biased by a vertical force (F3) on the nozzle from the printing material on the underlying material, such that the printer head moves from its equilibrium into a position at a desired vertical distance (?z1) from the underlying material.

Abstract: A printer head (200, 300, 400) for a 3D-printing apparatus, comprising a nozzle (210, 310, 450) arranged to deposit one or more adjacently arranged filaments of printing material to form at least one layer of an object to be produced. The nozzle comprises at least one exterior surface (220) configured to be brought into abutting contact with a peripheral edge (280) of the at least one layer, and configured to be guided along the peripheral edge of the at least one layer and on a predetermined distance into the at least one layer.

Abstract: The invention provides a lighting panel, for use for example within a modular surface system, comprising one or more strips of solid state lighting elements associated with a reflector structure. The lighting panel is adapted for improved uniformity of light intensity across the width of its output area. Lighting elements comprise two or more subsets, each subset adapted to collectively generate a different light intensity profile across the width of the panel output window. The subsets are selectively adapted to generate profiles which, when blended, mutually offset one another's deviations from some common mean intensity across the width of the output window, thereby generating a combined intensity profile of improved uniformity. Embodiments include arrangements in which subsets of lighting elements are adapted to have differing actual or virtual optical path lengths to the reflector surface.

Abstract: The invention provides a lighting panel, for use for example within a modular surface system, comprising one or more strips of solid state lighting elements associated with a reflector structure. The lighting panel is adapted for improved uniformity of light intensity across the width of its output area. Lighting elements comprise two or more subsets, each subset adapted to collectively generate a different light intensity profile across the width of the panel output window. The subsets are selectively adapted to generate profiles which, when blended, mutually offset one another's deviations from some common mean intensity across the width of the output window, thereby generating a combined intensity profile of improved uniformity. Embodiments include arrangements in which subsets of lighting elements are adapted to have differing actual or virtual optical path lengths to the reflector surface.

Abstract: A transmissive spectral purity filter is configured to transmit extreme ultraviolet radiation. The spectral purity filter includes a filter part having a plurality of apertures configured to transmit extreme ultraviolet radiation and to suppress transmission of a second type of radiation. Each aperture has been manufactured by an anisotropic etching process.

Abstract: A transmissive spectral purity filter is configured to transmit extreme ultraviolet radiation. The spectral purity filter includes a filter part having a plurality of apertures configured to transmit extreme ultraviolet radiation and to suppress transmission of a second type of radiation. Each aperture has been manufactured by an anisotropic etching process.