The Heart of Harvard's Time Machine
The Project: When Harvard University associate Dr. Robert Simcoe, was designing a groundbreaking photographic plate scanner, he contacted GrayGlass looking for an unusual white glass platen incorporating Anti-Newton Ring glass. That is a simple requirement, but GrayGlass project manager Bart Fried identified an underlying issue – a requirement for extremely uniform diffusion of the backlight source. The light source is an array of LED's directly under the platen. The LED’s give a reasonably uniform 'wall' of light for general purposes, but it was not nearly uniform enough for this demanding application. One of the critical functions of the scanner is to accurately scan the density of the entire photo plate including its seemingly “empty” space, without imparting any artificial density changes or artifacts created by the scanner itself.