Solar reflecting mirror and method of making same
View Patent ↗A solar reflecting mirror having a curved reflective surface includes a plurality of transparent shaped segments held together by securing facilities to provide a shaped transparent substrate having a convex surface and an opposite concave surface, the concave surface having a focal area. A solar reflecting coating is provided over the convex surface of the shaped substrate to reflect visible and infrared waves of the electromagnetic scale to the focal area of the shaped transparent substrate. A method of making the solar mirror is also disclosed.
1. A solar reflecting mirror having a curved reflective surface, comprising:
a plurality of transparent shaped segments;
securing means to hold the segments together to provide a shaped transparent substrate having a convex surface and an opposite concave surface having a focal area, and
a solar reflecting coating over one of the surfaces of the shaped substrate, wherein the coating reflects visible and infrared waves of the electromagnetic spectrum toward the focal area of the shaped transparent substrate.
2. The solar reflecting mirror of claim 1 wherein the shaped transparent substrate is made of glass and the shape is selected from the group of a parabolic shaped substrate, and a spherical shaped substrate.
3. The solar reflecting mirror of claim 2 wherein each of the transparent shaped segments comprises six sides, wherein three sides of each of the shaped segments form a part of the periphery of the shaped substrate, two of the sides of the shaped segments are joined to adjacent sides of two other shaped segments and one side of the shaped segments provides a part of an inner wall of a hole.
4. The solar reflecting mirror of claim 3 wherein the one side of each segment that provides a part of an inner wall of a hole has a radius to provide the shaped substrate with a center circular hole, and the three sides of each of the shaped segments that form a part of the periphery of the shaped substrate are linear sides.
5. The solar reflecting mirror according to claim 1 wherein the securing means comprises one or more rigid rings.
6. The solar reflecting mirror according to claim 5 wherein the rings are secured to the convex surface of the shaped segments and the reflective coating is over the rings and the convex surface of the shaped glass substrate.
7. The solar reflecting mirror according to claim 5 wherein the convex surface of the shaped segments has the reflective coating and the rings are secured to the reflective coating.
8. The solar reflecting mirror according to claim 1 wherein the securing means comprises an adhesive securing adjacent sides of the shaped segments together.
9. A method of making a shaped solar reflecting mirror comprises:
shaping two or more flat transparent segments to provide two or more shaped transparent segments wherein each of the shaped transparent segments comprises part of the shaped transparent substrate,
securing the shaped transparent segments together to provide the shaped transparent substrate, wherein the shaped transparent substrate comprises a convex surface and opposite concave surface having a focal area, and
providing a reflective coating over at least one of the surfaces of the transparent substrate.
10. The method according to claim 9 wherein the reflective coating is over the convex surface of the shaped substrate.
11. The method according to claim 9 wherein the shaping two or more flat transparent segments comprise:
cutting two or more pieces from a flat transparent sheet, and
press bending each pieces to provide the shaped segments, wherein perimeter of the shaped transparent substrate has corners and a linear side between adjacent corners.
12. The method according to claim 9 wherein securing the shaped segments together comprises positioning the segments together to form the shaped substrate and securing a rigid member to the convex surface of each of the shaped segments to secure the shaped segments together.
13. The method according to claim 9 wherein securing the shaped segments comprises applying an adhesive layer to selected edges of the shaped segments and biasing selected edges of the segments together to secure the shaped segments together.
14. The method according to claim 9 wherein each of the transparent shaped segments comprises six sides, wherein three sides of each of the shaped segments form a part of the periphery of the shaped substrate, two of the sides are joined to adjacent sides of two other shaped segments and one side provides a part of an inner wall of a hole.
15. The method according to claim 9 wherein securing the shaped segments together is practiced before the reflective coating is applied over at least one of the surfaces of the transparent substrate.
16. The method according to claim 9 wherein the providing a reflective coating is practiced by applying the reflective coating to a surface of the flat segments designated to be the convex surface of the shaped substrate and securing the shaped segments is practiced after the reflective coating is applied over the transparent segments.