VARIABLE DIFFUSER

摘要

The invention relates to a diffuser (1) for use in a lighting device. The diffuser (1) comprises an at least partially transparent first layer (10) and an adjoining at least partially transparent second layer (20), the first layer being continuous and comprising a stretchable elastomer, the second layer being a segmented layer comprising a material with a high effective stiffness measured as the product of the thickness of the material and the elastic modulus of the material. The second layer (20) comprises a non-periodic pattern of segments (21a, 21b, 21c, 21d, 21e) having different dimensions. The diffuser is stretchable between a first position in which the first layer is in a non-stretched state and the segments of the second layer are arranged adjacent each other such as to form a substantially continuous layer, and a second position in which the first layer is stretched out and the segments of the second layer are separated from each other such that part of the first layer is exposed.

主权项

1. A diffuser comprising an at least partially transparent first layer and an adjoining at least partially transparent second layer, the first layer being continuous and comprising a stretchable elastomer, the second layer being a segmented layer comprising a material with a high effective stiffness measured as the product of the thickness of the material and the elastic modulus of the material,
wherein the second layer comprises a non-periodic pattern of segments having different dimensions, and wherein the diffuser is stretchable between a first position in which the first layer is in a non-stretched state and the segments of the second layer are arranged adjacent each other such as to form a substantially continuous layer, and a second position in which the first layer is stretched out and the segments of the second layer are separated from each other such that part of the first layer is exposed.