Corning Incorporated
Apparatus and methods to determine stresses in cover glass of handheld devices

Abstract:

Apparatus and methods of for measuring stress incurred by a cover glass of a handheld device when the cover glass contacts a surface during a drop event. A transparent solid piece of material with a drop surface and a back surface is provided and oriented to receive a dropped handheld device so that the cover glass contacts the drop surface. At least two optical detectors are directed at the back surface of the transparent material to obtain image data including a plurality of pixel points.