Techniques for manufacturing slanted structures

This invention describes a special kind of optical surface, like a microscopic corrugated sheet, made from two different materials. The tiny ridges on this surface are designed to have different shapes in different areas, even though their height remains largely the same. Specifically, the claims narrow the invention to surfaces where the ridges are very wide, taking up more than 70% (and potentially over 80%) of the repeating pattern in certain areas. This variation in ridge shape allows the surface to bend or direct light in specific ways.