Lighting assemblage
OwnerLars A. Bergkvistinventor
Life of this patent
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Abstract
A lamp unit comprising a box-like body which is provided with one or more apertures covered with a sheet of material transparent to visible light and which houses a light source. In accordance with the invention the side (10) of the sheet (6) or sheets facing inwardly of the body (1) is, or are, covered totally or partially with a layer of a substance which fluoresces when irradiated with ultraviolet light, and the light source (7) is arranged to transmit ultraviolet light. In accordance with one preferred embodiment of the invention the sheet (6), or sheets, is, or are, made of a material which is transparent to visible light but impermeable to ultraviolet radiation.
Claims5
A lamp unit comprising a box-like body which is provided with at least one aperture covered with at least one sheet of material transparent to visible light, and which houses a light source, where the side (10) of said sheet (6) facing inwardly of the body (1) is at least partially covered with a layer of a substance which fluoresces when irradiated with ultraviolet light and where said light source (7,8,9) is arranged to transmit ultraviolet light characterized in that said at least one sheet (6) is made of a material transparent to visible light but impermeable to ultraviolet radiation, in that the substance comprises at least one paint which fluoresces when irradiated with ultraviolet light, thereby giving a visible light but which paint is transparent or dark when irradiated by visible light, and in that an image is applied to said sheet (6) by said paint which fluoresces in a visible colored light, whereby the image only is visible to an observer when the light source radiates ultraviolet light.
Dependencies are inferred from the claim text.