Abstract: Systems and methods for evaluating glass-based substrates for birefringence defects are disclosed. In a one embodiment, a method includes generating an image of the at least one glass-based substrate, and determining at least one transmission curve, wherein the transmission curve plots transmission values versus position along the at least one line. The method further includes determining a defect metric from the at least one transmission curve. The method also includes comparing the defect metric to at least one standard.

Abstract: Systems and methods for ambient-light reduction in display systems with OLED or LCD based displays are disclosed. The base display is interfaced with an ambient-light-reducing (ALR) structure to form the display system. The ALR structure includes an ALR component. The ALR component can be a photochromic component or a fixed neutral-density component. The ALR structure attenuates incoming ambient light as well as outgoing redirected ambient light that is generated within the base display and is then emitted from the display system into the ambient environment. This increases the ambient contrast relative to that of the base display alone.