Optical film and method of manufacture

摘要

A method of forming an element of an imaging device includes providing a first layer and a second layer. The method also includes extruding the first layer with the second layer, where the first layer has a melt viscosity at a point of extrusion that is greater than a melt viscosity at the point of extrusion of the second layer. Moreover, the method includes forming a plurality of optical elements over a surface of the second layer.