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? The LCD screen would be forced to a uniform white tone and a regular polarizer fitted to the camera lens. Rotating the polarizer causes the LCD screen to go from light tone to dark one. Placing a plastic or even some glass object between the two will allow for the colorful (sometimes) visualization of stress patterns within the subject (if it has not been carefully annealed). I just did a quick test and am thinking that there are even additional hidden applications for this "system" ... right now I am trying to simply find out if this use of your laptop's LCD screen is something already widely known. Feedback? andy
