Abstract:
A light source assembly (1, 11, 13) comprising: a solid state lighting device (3); a wavelength converting element (4) arranged to receive light emitted by the solid state lighting device (3) and adapted to convert some of the received light to a different wavelength; and a scattering layer (7, 12, 14) applied to a light emitting surface (6) of the wavelength converting element (4). The scattering layer (7, 12, 14) is adapted to scatter light back to the wavelength converting element (4), and a backscattering strength of the scattering layer (7, 12, 14) varies over said light emitting surface (6) so as to reduce variations in the color of the light emitted from the light emitting surface (6).
Abstract:
The invention provides a lighting unit (100) comprising (a) a lighting unit cavity (130), (b) a light source unit (110), for light source unit light (111), wherein the light source unit (110) comprises a light source (1100) and a collimator (1200), and (c) a light exit window (120), configured to enclose at least part of the lighting unit cavity (130) and configured to allow transmission of at least part of the light source unit light (111) as a beam of light (101), wherein the light exit window (120) comprises an upstream face (125) and a downstream face (126), with the upstream face (125) directed to the lighting unit cavity (130); wherein the upstream face (125) comprises light outcoupling structures (140), configured to couple the light source unit light (111) via the light exit window (120) out of the lighting unit (100).
Abstract:
The invention concerns a method for 3D printing an object (6, 7), the method comprising the steps of providing a layer of a liquid silicone material (42) on a translation platform (2) of a 3D printing device (1, 10) and/or on a previously cured layer of the liquid silicone material arranged on the translation platform, the translation platform being adapted for performing a translatory movement in at least one direction, selectively curing the liquid silicone material in successive layers by moving a beam (33) of IR radiation emitted by a light source (31) across a surface (44) of the liquid silicone material (42) in a pre-defined pattern by means of a scanning device (32), and performing a translatory movement of the translation platform in the at least one direction upon finishing the curing of each of the successive layers. The invention further concerns a corresponding 3D printing device (1, 10).
Abstract:
A method is provided, wherein a lighting device (200, 300, 400, 500) comprising an at least partly light transmitting envelope (110) and a solid state light source (120) is manufactured. The method comprises arranging (710) an at least partly light transmitting plastic material (140) in a mold (130) having a surface structure (132) arranged on an inner surface portion of the mold and blow molding (720) the plastic material so as to form the envelope. During the blow molding, the surface structure is at least partly transferred to the at least partly light transmitting plastic material, thereby formingan optical structure (150) on a portion of an outer surface of the envelope. The envelope is then removed (730) from the mold and arranged (740) to at least partly enclose the solid state light source. The optical structure may be formed to generate a desired optical effect.
Abstract:
A lighting device (100, 200, 300, 400) is disclosed, comprising an at least partly light transmitting envelope (110) arranged to at least partly enclose a light source (120). The envelope comprises a portion (114) that is elastic such that its extension and orientation relative to a nominal optical axis of a base (140) of the lighting device is adjustable so as to allow for light output from the lighting device to be modified. A method for manufacturing such lighting device is also disclosed.
Abstract:
A lighting unit comprising a tapering cavity surrounded by a circumferential reflective wall and extending between a light emission window and a light entrance surface where a light source is (to be) mounted. An optical plate having a light outcoupling structure is provided at the light emission window for redirecting and issuing light as a uniform lighting unit light beam. Said uniform lighting unit light beam has a first beam emission angle ß in a first direction and optionally, for example for a rectangular shaped light emission window, a second beam emission angle ɣin a second direction transverse to the first direction. The tapering cavity having a first cut-off angle α in said first direction, wherein ß = α +2*δ with 0°
Abstract:
The invention relates to a method for controlling a lighting system, wherein the lighting system comprises a plurality of light-emitting ceiling tiles and a control unit for controlling the plurality of light-emitting tiles. The method comprises the step of controlling the plurality of light-emitting tiles to provide a predetermined luminance contrast in the ceiling. The method further comprises the step of, for the predetermined luminance contrast, controlling the plurality of light-emitting tiles to provide a substantially uniform light distribution incident on a target surface such as a horizontal work plane. The method enables the lighting conditions in a room to be adjusted for improving visual comfort and illumination without affecting the illumination at a task level.