Abstract: A lens plate has an array of lenslets. A first surface comprises a plurality of individual cells, each cell delimiting one side of a respective lenslet of the array. A second opposite surface comprises a set of grooves, each groove delimiting a second, opposite side, of a sub-array of the lenslets of the array of lenslets. The array of lenslets is a circular array comprising a plurality of concentric rings. Each ring comprises a plurality of straight segments, and each segment comprises multiple said lenslets arranged in a row. The lens plate design thus combines grooves on one side which cover multiple lenslets and a cellular lens structure on the opposite side.

Abstract: A lighting device is disclosed that comprises a glass tube (10); a solid state lighting assembly in said glass tube, said assembly comprising an electrically insulating optical film (20) comprising at least one arcuate portion lining a part (12) of the inner surface of the glass tube, wherein the glass tube further comprises a further part (14) defining a light exit portion; and a plurality of solid state lighting elements (32) on a carrier (30), said carrier contacting said optical film; a thermally conductive member (40, 42) in between at least a part of the solid state lighting assembly and the glass tube for thermally coupling the solid state lighting elements to the glass tube; and a transparent or translucent electrically insulating cover (50, 60) contacting the electrically insulating optical film and covering the solid state lighting elements. A luminaire including such a lighting device and a lighting device assembly method are also disclosed.

Abstract: A lighting device including a glass tube; a solid state lighting assembly in said glass tube, said assembly having an electrically insulating optical film having at least one arcuate portion lining a part of the inner surface of the glass tube, wherein the glass tube further has a further part defining a light exit portion; and a plurality of solid state lighting elements on a carrier, said carrier contacting said optical film; a thermally conductive member in between at least a part of the solid state lighting assembly and the glass tube for thermally coupling the solid state lighting elements to the glass tube; and a transparent or translucent electrically insulating cover contacting the electrically insulating optical film and covering the solid state lighting elements. A luminaire including such a lighting device and a lighting device assembly method are also disclosed.

Abstract: A lighting device is disclosed that comprises a glass tube (10); a solid state lighting assembly in said glass tube, said assembly comprising an electrically insulating optical film (20) comprising at least one arcuate portion lining a part (12) of the inner surface of the glass tube, wherein the glass tube further comprises a further part (14) defining a light exit portion; and a plurality of solid state lighting elements (32) on a carrier (30), said carrier contacting said optical film; a thermally conductive member (40, 42) in between at least a part of the solid state lighting assembly and the glass tube for thermally coupling the solid state lighting elements to the glass tube; and a transparent or translucent electrically insulating cover (50, 60) contacting the electrically insulating optical film and covering the solid state lighting elements. A luminaire including such a lighting device and a lighting device assembly method are also disclosed.

Abstract: A lighting device including a glass tube; a solid state lighting assembly in said glass tube, said assembly including an electrically insulating optical film having at least one arcuate portion lining a part of the inner surface of the glass tube, wherein the glass tube includes a further part defining a light exit portion; and a plurality of solid state lighting elements on a carrier, said carrier contacting said optical film; a thermally conductive member in between at least a part of the solid state lighting assembly and the glass tube for thermally coupling the solid state lighting elements to the glass tube; and a transparent or translucent electrically insulating cover contacting the electrically insulating optical film and covering the solid state lighting elements. A luminaire including such a lighting device and a lighting device assembly method are also disclosed.

Abstract: A lighting device is disclosed that comprises a glass tube (10); a solid state lighting assembly in said glass tube, said assembly comprising an electrically insulating optical film (20) comprising at least one arcuate portion lining a part (12) of the inner surface of the glass tube, wherein the glass tube further comprises a further part (14) defining a light exit portion; and a plurality of solid state lighting elements (32) on a carrier (30), said carrier contacting said optical film; a thermally conductive member (40, 42) in between at least a part of the solid state lighting assembly and the glass tube for thermally coupling the solid state lighting elements to the glass tube; and a transparent or translucent electrically insulating cover (50, 60) contacting the electrically insulating optical film and covering the solid state lighting elements. A luminaire including such a lighting device and a lighting device assembly method are also disclosed.