Light-diffusion box

A box for diffusing the light emitted by a light source placed within said box especially for illuminating a subject, wherein said light-diffusion box comprises in combination:

• a hollow rear portion having multiple facets and a reflecting internal face, said hollow rear portion being constituted by a first sheet of opaque material with folding lines placed between the facets of said hollow rear portion to permit the diffusion box to be flat or to be put in three dimensional form in order to be used;
• a diffusing screen constituted by a second sheet made of translucent material which is capable of being folded flat or rolled up or being erected on said first sheet of opaque material in a first configuration forming a flat planar diffusion surface or a second configuration forming a three dimensional diffusion surface;
• assembling means provided respectively on the edges of the first sheet and on the edges of the second sheet for erecting said second sheet in either said first or said second configurations;
• the aforesaid first sheet provided with a periphery having a polygonal contour and provided at its center with an opening for positioning a light source within the diffusion box;
• folding lines extending from said central opening of the first sheet to the periphery of said sheet;
• extensions placed on the periphery of said first sheet and articulated on the periphery of said sheet by means of folding lines, spacings being provided between the aforesaid extensions and the adjacent edges of the periphery of said first sheet, the width of said spacing being progressively greater in the outward direction;
• the edges of said extensions and the edges of the periphery of said first sheet being so designed as to be joined together in order to convert said first sheet to a three dimensional state and thus forming the follow rear portion of the diffusion box.

A box for diffusing the light emitted by a light source placed within said box especially for illuminating a subject placed in front of it, wherein said light-diffusion box comprises in combination:

• a hollow rear portion having multiple facets and a reflecting internal face, said hollow rear portion being constituted by at least two first sheets of opaque material forming a continuous surface provided with folding lines between the facets of said hollow rear portion to permit the diffusion box to be in a flat state or to be erected in three dimensional shape in readiness for use;
• diffusing screen made of translucent material constituted by a second sheet which is also capable of being folded, rolled or in a flat state or being erected on said first sheets of opaque material in a first configuration forming a flat planar diffusion surface or a second configuration forming a three dimensional diffusion surface;
• assembling means provided respectively on the edges of the first sheets and on the edges of the second sheet for erecting said second sheet in either said first or said second configurations;
• an opening formed in said first sheets for placing a light source within the diffusion box;
• folding lines extending from said opening to the periphery of the continuous surface formed by joining the first sheets together;
• near the periphery of said continuous surface formed by joining the first sheets together, a series of cut-out portions which increase in width in the outward direction and the edges of which are adapted to be joined together so as to convert said surface to a three dimensional state and thus to form the hollow rear portion of the diffusion box;
• a polygonal contour at the periphery of said second sheet and corresponding in shape to the contour of the hollow casing formed by the first sheet when this latter is converted to a three dimensional state so as to form said hollow casing.