Window lamination to throw maximum sun-light on the ceiling, so reflected light replaces use of electric lamp.

Question

I am looking for a special lamination (polarized?) which may be pasted on the window glass, this should be able to throw maximum sunlight coming in, on to the ceiling, this could allow reflected diifused light, which could replace daytime electric light usage in offices and may be also in homes.

Answer 1

A simple lamination will not diverge light that much especially as the sun traverses the sky during the day. You would need a reflective surface and your idea will not work well on cloudy days or when there is limited daylight in the winter. Plus if the building has only light coming in from windows on the outer part of the building, by the time you diffuse it to many offices, it will be quite dim. Just a side note, using a polarizer anywhere would reduce the light intensity by a half.

Answer 2

You would be looking for a molded Fresnel lens type structure but it is fairly useless because it only has one angle molded in and, of course, totally destroys the ability to see out and if it is a film, it can't be removed to see out.
You might wish to look at horizontal venetian blinds with a mirrored surface on one side that can be adjusted or moved out of the way as needed.