Non-luminance lighting panel

Claim 2

A low-luminance lighting panel comprising a plurality of refracting prismatic elements of pointed dome shape situated on the outer surface of said panel, each of said elements having a circular base and an axis of symmetry wherein the lateral surfaces of said elements are defined by lines symmetric to said axis of symmetry of the pointed element, each of said lines being comprised of a first arc having a center situated beyond the axis of symmetry of said pointed element and above the plane of the inner face of the panel, a line segment tangential to said first arc, and a second arc tangential to said line segment and having its center situated at the intersection of the axis of the symmetry of the element and the plane of the base of the element.

Claim 3

A lighting panel of low luminance comprising a plurality of main optical refracting elements of pointed dome shape situated on the outer surface of said panel, each of said elements having a circular base and an axis of symmetry and having curved lateral surfaces with respect to the axis of symmetry of the pointed element, the cross-section of each of said main pointed elements taken through an axial plane being defined by a curved line comprising first and second arcs symmetric with respect to said axis of symmetry of the pointed element, each of said arcs having a center at a point situated beyond said axis of symmetry equidistant from said axis of symmetry and on a straight line parallel to the plane of the interior face of the panel, a third arc having its center situated at the intersection of the axis of symmetry of the pointed element with the base of said pointed element and covering equal angles on each side of said axis of symmetry of the pointed element, and two line segments symmetric with relation to said axis of symmetry of the pointed element and tangential respectively to said third arc and to said first and second arcs of said elements defining flat regions between adjacent elements; and a plurality of optical refracting pointed elements of small dimension the axial cross section of which is similar to the axial cross section of said main pointed elements and situated in the flat spaces of the exterior face of the panel between the bases of said main pointed elements.

Claim 4

A lighting panel of low luminance comprising a plurality of main optical refracting elements of pointed dome shape situated on the outer surface of said panel, each of said elements having a circular base and an axis of symmetry and having curved lateral surfaces with respect to the axis of symmetry of the pointed element, the cross-section of each of said main pointed elements taken through an axial plane being defined by a curved line comprising first and second arcs symmetric with respect to said axis of symmetry of the pointed element, each of said arcs having a center at a point situated beyond said axis of symmetry equidistant from said axis of symmetry and on a straight line parallel to the plane of the interior face of the panel, a third arc having its center situated at the intersection of the axis of symmetry of the pointed element with the base of said pointed element and covering equal angles on each side of said axis of symmetry of the pointed element, and two line segments symmetric with relation to said axis of symmetry of the pointed element and tangential respectively to said third arc and to said first and second arcs of said elements defining flat regions between adjacent elements; and a plurality of optical refracting pointed elements of small dimension the axial cross section of which is similar to the axial cross section of said main pointed elements and situated in the flat spaces of the exterior face of the panel between the bases of said main pointed elements.

Claim 5

A lighting panel according to claim 2 wherein said main pointed elements are arranged in staggered relation on the outer face of the panel, having their bases tangential to others thereof and each of said smaller pointed elements having its base tangential to the bases of three surrounding main pointed elements.

Claim 6

A lighting panel, according to claim 2 wherein said main pointed elements are arranged on the exterior face of the panel in orthogonal rows and columns having their lateral surfaces intersecting others thereof such that the bases of said main pointed elements are in squared form having bevelled vertices according to an arc of the base of the pointed element, and each one of said similar but smaller pointed elements positioned between four main continguous pointed elements with its base tangential to the bases of the said four main pointed elements.

Claim 7

A low luminance lighting panel, having on its exterior surface a plurality of optical refracting elements of pointed dome shape having a circular base and an axis of symmetry wherein the axial cross sections of said pointed elements are defined by symmetric lines to said axis of symmetry of the pointed element each of said lines being composed of a first arc having its center situated beyond the axis of symmetry of the pointed element and above the plane of the inner face of the panel, a straight line segment tangential to said first and second arc, tangential to said straight line segment and having its center situated at the intersection of the axis of symmetry of the pointed element and the base of said pointed element, each of said refracting optical pointed elements partially intersecting other elements laterally.

Claim 8

A low luminance lighting panel, having on its exterior surface a plurality of optical refracting elements of pointed dome shape having a circular base and an axis of symmetry wherein the axial cross sections of said pointed elements are defined by symmetric lines to said axis of symmetry of the pointed element each of said lines being composed of a first arc having its center situated beyond the axis of symmetry of the pointed element and above the plane of the inner face of the panel, a straight line segment tangential to said first and second arc, tangential to said straight line segment and having its center situated at the intersection of the axis of symmetry of the pointed element and the base of said pointed element, each of said refracting optical pointed elements partially intersecting other elements laterally.

Claim 9

A lighting panel, according to claim 5 wherein said refracting optical pointed elements are positioned in staggered relation on the outside face of the panel, in such a way that a common chord of the bases of each two intersecting pointed elements cover arcs of 60* of the circumferences of the bases, which have the form of regular hexagons.

Claim 10

A lighting panel according to claim 5 wherein the intersecting optical refracting pointed elements are arranged on the exterior face of the panel in orthogonal rows and columns.

Claim 11

A lighting panel according to claim 7, wherein the intersecting optical refracting pointed elements are arranged in such that the common chord of the bases of each two pointed elements defines arcs of 90* of the circumference of these bases, which have square form.

Claim 12

A lighting panel according to claim 7 wherein the intersecting optical refracting pointed elements are arranged such that the common chord of the bases of each two intersecting pointed elements define arcs of less than 90* of the circumference of said bases, said bases thus having a squared form having bevelled vertices with small arcs and thus providing a flat space between each four continguous intersecting pointed elements, each flat space being occupied by a pointed element of smaller dimension, the axial section of which is similar to that of said refracting pointed elements, and having its base tangential to the bases of said four contiguous refracting intersecting pointed elements.

Claim 13

A low luminance lighting panel comprising a plurality of prismatic refracting elements on the outer surface of said panel, said elements being square based pyramids having lateral faces in the form of cylindrical surfaces, the axial cross section of said pyramids through a plane normal to two opposite lateral faces being defined by two arcs symmetric with respect to the axis of symmetry of the pyramid and the centers of which are situated at points beyond said axis of symmetry of the pyramid on a straight line parallel to the plane of the face of the interior surface of the panel and situated above it, said refracting pyramids being arranged on the outer face of the panel in orthogonal rows and columns, the sides of the bases of said continguous pyramids being evenly spaced from one another resulting in two orthogonal series of flat bands equally spaced.

Claim 14

A low luminance lighting panel comprising a plurality of prismatic refracting elements on the outer surface of said panel, said elements being square based pyramids having lateral faces in the form of cylindrical surfaces, the axial cross section of said pyramids through a plane normal to two opposite lateral faces being defined by two arcs symmetric with respect to the axis of symmetry of the pyramid and the centers of which are situated at points beyond said axis of symmetry of the pyramid on a straight line parallel to the plane of the face of the interior surface of the panel and situated above it, said refracting pyramids being arranged on the outer face of the panel in orthogonal rows and columns, the sides of the bases of said continguous pyramids being evenly spaced from one another resulting in two orthogonal series of flat bands equally spaced.

Claim 15

A lighting panel according to claim 10 wherein the bases of two contiguous pyramids are separated, the space between adjacent pyramids being defined such that a plane tangential to a lateral face of one of said two pyramids and containing the contiguous side of the base of the other pyramid forms an angle of 60* with a plane normal to said exterior face of the panel.