| abstract |
Molded vinyl sheets with optical quality surfaces and methods for making the same. The vinyl sheets are made by molding liquid vinyl in a mold. In embodiments, the mold forms parallel optical quality flat surfaces. In one embodiment, a stiffening plastic is molded in the middle of the vinyl sheet between the parallel optical quality flat surfaces. In another embodiment, the mold forms one optical quality flat surface while the surface parallel to the optical quality flat surface is bonded to a prism. |