Patterns on glass for increased light transmission and/or light trapping
View Patent ↗In one non-limiting embodiment, a transparency for use as a cover plate for a solar collector, window and/or room divider includes a major surface of a glass substrate having Brewster tetrahedrons to convert s-polarized light waves to converted p-polarized light waves to reduce the percent of light wave reflectance of the substrate. In another non-limiting embodiment, the transparency includes a major surface of the substrate having pyramidal tetrahedrons to capture light waves within the body of the substrate to reduce the percent of visible light reflection.
1. A transparency for converting s-polarized light waves to converted p-polarized light waves, wherein the transparency comprises:
a transparent substrate having a first major surface and an opposite second major surface;
a tetrahedron comprising points A, B, C and D, wherein a first triangular facet is defined by sides extending between points A-B-D and the sides of the first facet at the point A subtend a first angle and the sides of the first facet at the point B subtend a second angle, wherein the first and second angles are equal to one another; a second triangular facet is defined by sides extending between points A-B-C and the sides of the second facet at the point A subtend a third angle and the sides of the second facet at the point B subtend a fourth angle, wherein the third and fourth angles are equal to one another, a third facet is defined by sides extending between points B-C-D, and a fourth facet is defined by sides extending between points A-C-D, and
the sides of the first facet lie in a plane of the first major surface of the transparent substrate and surfaces of each of the second, third and fourth facets have a reflective surface,
wherein the points A, B, C and D of the tetrahedron lie on X, Y, Z co-ordinances, wherein the X co-ordinance lies in a first plane, the Y co-ordinance lies in a second plane perpendicular to the first plane, and the Z co-ordinance lies in a third plane perpendicular to the first and the second planes, wherein points A, B, C and D of the tetrahedron lie on the X, Y, Z co-ordinances as follows:
Co-ordinances
Points
X
Y
Z
A
0
0
0
B
1
0
0
C
0.5
0.8125
0
D
0.5
0.5
0.75.
2. The transparency according to claim 1 wherein the first, second, third and fourth angles are equal to one another.
3. The transparency according to claim 1 , wherein the transparency is a cover plate for a solar cell.
4. The transparency according to claim 1 , wherein the sides of the first facet define an opening of a hole in the first major surface of the substrate and surfaces of the second, third and fourth facets are walls of the hole, wherein the walls of the hole are between the first and the second major surfaces of the substrate.
5. The transparency according to claim 4 , wherein the tetrahedron is a first tetrahedron and comprising a second, third and fourth tetrahedron, wherein the second, third and fourth tetrahedrons each comprise the points A, B, C and D, wherein a first triangular facet of each one of the second, third and fourth tetrahedron is defined by sides extending between points A-B-D and the sides of the first facet at the point A of each of the second, third and fourth tetrahedron subtend a first angle and the sides of the first facet at the point B of each of the second, third and fourth tetrahedron subtend a second angle, wherein the first and second angles of each of the second, third and fourth tetrahedron are equal to one another; a second triangular facet is defined by sides extending between points A-B-C and the sides of the second facet at the point A of each of the second, third and fourth tetrahedron subtend a third angle and the sides of the second facet at the point B of each of the second, third and fourth tetrahedron subtend a fourth angle, wherein the third and fourth angles of each of the second, third and fourth tetrahedron are equal to one another; a third facet is defined by sides extending between points B-C-D of each of the second, third and fourth tetrahedron, and a fourth facet is defined by sides extending between points A-C-D of each of the second, third and fourth tetrahedron, and
the sides of the first facet of each of the second, third and fourth tetrahedron lie in a plane of the first major surface of the transparent substrate and surfaces of each of the second, third and fourth facets of each of the second, third and fourth tetrahedron have a reflective surface, and
wherein the side between the points A-B of the first tetrahedron and the side between the points B-A of the second tetrahedron overlay one another at the first major surface of the substrate; the side D-B of the first tetrahedron and the side between the points B-D of the third tetrahedron overlay one another at the first major surface of the substrate; and the side between the points B-D of the second tetrahedron and the side between the points D-B of the fourth tetrahedron overlay one another at the first major surface of substrate.
6. The transparency according to claim 5 wherein the first, second, third and fourth tetrahedrons form a first segment of the first major surface of the substrate, and comprising additional segments covering the remainder of the major surface of the substrate.
7. The transparency according to claim 5 wherein the transparency is selected from the group of a transparent office wall divider, a door window; a glass window; an automobile roof window; glass panels for a hot house; glass cover plates for outdoor lighting, and glass cover for a display.
8. The transparency according to claim 1 , wherein the first facet is a portion of the first major surface of the substrate and the second, third and fourth facets are above and facing away from the substrate.
9. The transparency according to claim 8 , wherein the tetrahedron is a first tetrahedron and comprising a second, third and fourth tetrahedron, wherein the second and third and fourth tetrahedrons each comprise the points A, B, C and D, wherein a first triangular facet of each one of the second, third and fourth tetrahedron is defined by sides extending between points A-B-D and the sides of the first facet at the point A of each of the second, third and fourth tetrahedron subtend a first angle and the sides of the first facet at the point B of each of the second, third and fourth tetrahedron subtend a second angle, wherein the first and second angles of each of the second, third and fourth tetrahedron are equal to one another; a second triangular facet is defined by sides extending between points A-B-C and the sides of the second facet at the point A of each of the second, third and fourth tetrahedron subtend a third angle and the sides of the second facet at the point B of each of the second, third and fourth tetrahedron subtend a fourth angle, wherein the third and fourth angles of each of the second, third and fourth tetrahedron are equal to one another, a third facet is defined by sides extending between points B-C-D of each of the second, third and fourth tetrahedron, and a fourth facet is defined by sides extending between points A-C-D of each of the second, third and fourth tetrahedron, and
the sides of the first facet of each of the second, third and fourth tetrahedron lie in a plane of the first major surface of the transparent substrate and surfaces of each of the second, third and fourth facets of each of the second, third and fourth tetrahedron have a reflective surface, and
wherein the side between the points A-B of the first tetrahedron and the side between the points B-A of the second tetrahedron overlay one another at the first major surface of the substrate; the side D-B of the first tetrahedron and the side between the points B-D of the third tetrahedron overlay one another at the first major surface of the substrate; and the side between the points B-D of the second tetrahedron and the side between the points D-B of the fourth tetrahedron overlay one another at the first major surface of substrate.
10. The transparency according to claim 9 wherein the first, second, third and fourth tetrahedrons form a segment of the first major surface of the substrate and comprising additional segments covering the remainder of the first major surface of the substrate.
11. A transparency for capturing internally reflected light, wherein the transparency comprises:
a transparent substrate having a first major surface and an opposite second major surface;
a tetrahedron comprising points E, F, G and H, wherein a first triangular facet is defined by sides extending between points E-F-H and the sides of the first facet at the point E subtend a first angle and the sides of the first facet at the point F subtend a second angle, wherein the first and second angles are equal to one another; a second triangular facet is defined by sides extending between points E-F-G and the sides of the second facet at the point E subtend a third angle and the sides of the second facet at the point F subtend a fourth angle, wherein the third and fourth angles are equal to one another, a third facet is defined by sides extending between points F-G-H, and a fourth facet is defined by sides extending between points E-G-H, and
the sides of the first facet lie in a plane of the first major surface of the transparent substrate and surfaces of each of the second, third and fourth facets have a reflective surface,
wherein the points E, F, G and H of the tetrahedron lie on X, Y, Z co-ordinances, wherein the X co-ordinance lies in a first plane, the Y co-ordinance lies in a second plane perpendicular to the first plane, and the Z co-ordinance lies in a third plane perpendicular to the first and the second planes, wherein points E, F, G and H of the tetrahedron lie on the X, Y, Z co-ordinances as follows:
Co-ordinances
Points
X
Y
Z
E
0
0
0
F
1
0
0
G
0.5
{square root over (3)}/2
0
H
0.5
{square root over (3)}/6
0.42.
12. The transparency according to claim 11 , wherein the transparency is a cover plate for a solar cell.
13. The transparency according to claim 11 , wherein the first major surface of the substrate lies in a plane and the triangular base of the tetrahedron pyramid lies in the plane, and the first, second and third triangular surfaces are between the first and the second major surfaces of the substrate.
14. The transparency according to claim 11 , wherein the first major surface of the substrate and the triangular base of the tetrahedron pyramid lies in the first and the first, second and third triangular surfaces extend away from the first and the second major surfaces of the substrate.
15. The transparency according to claim 13 wherein the transparency is selected from the group of a transparent office wall divider; a door window; a glass window; an automobile roof window; glass panels for a hot house; glass cover plates for outdoor lighting, and glass cover for a display.
16. The transparency according to claim 11 , wherein the first facet is a portion of the first major surface of the substrate and the second, third and fourth facets are above and facing away from the substrate.
17. The transparency according to claim 16 , wherein the tetrahedron is a first tetrahedron and comprising a second, third and fourth tetrahedron, wherein the second and third and fourth tetrahedrons each comprise the points E, F, G and H, wherein a first triangular facet of each one of the second, third and fourth tetrahedron is defined by sides extending between points E-F-G; a second triangular facet is defined by sides extending between points E-G-H; a third facet is defined by sides extending between points E-F-H of each of the second, third and fourth tetrahedron, and a fourth facet is defined by sides extending between points F-G-H of each of the second, third and fourth tetrahedron, and
the sides of the first facet of each of the second, third and fourth tetrahedron lie in a plane of the first major surface of the transparent substrate and surfaces of each of the second, third and fourth facets of each of the second, third and fourth tetrahedron have a reflective surface, and
wherein the side between the points E-F of the first tetrahedron and the side between the points F-E of the second tetrahedron overlay one another at the first major surface of the substrate; the side E-G of the first tetrahedron and the side between the points G-E of the third tetrahedron overlay one another at the first major surface of the substrate; and the side between the points F-G of the second tetrahedron and the side between the points G-F of the fourth tetrahedron overlay one another at the first major surface of substrate.
18. The transparency according to claim 9 wherein the first, second, third and fourth tetrahedrons form a segment of the first major surface of the substrate and comprising additional segments covering the remainder of the first major surface of the substrate.