Mark - I've seen windows made up of rectangles (panes) of glass which are each, no longer than a foot. Bedsides, for lack of the right terminology, what about a 'piece' of glass in a frame for a 8" by 5" photo
May we ask questions? If so, is the object manufactured (man-made)?
Even more specifically, I'm thinking about fresnel mirror designs that lots of people could afford and make on their own.
I just read an incredible book "Sustainable Energy - without the hot air", by David MacKay. One of the main conclusions of the book is that solar mirror systems should be at the top of the list of alternative energy sources for North America (and other parts of the world too).
Hope this explanation helps to focus (arrr, arrr), the treasure hunt - when I first posted this I didn't want anyone to limit their creativity by getting boxed in to preconceived notions