Andy: Recently I shared this suggestion that glare light could be used as a large area source if one could not find or afford or otherwise procure a large sheet of polarizing material to cover a light box with. A student in my class mentioned that he saw strange effects when looking at his cell phone's display. An LCD display. After some discussion and looking into the situation it became apparent that one could use the LCD screen of a laptop or of separate display device as a pretty uniform and efficient background source for doing what some call "stress analysis" imaging or photography. Have you all heard/read about such application being described somewhere? welllll, not quite the same as using one in situ, but I *have* pulled apart many a dead LCD panel for it's polarizing filter ;)
