Abstract:
A method of making an optical element that includes a thermoplastic power portion, the method including laminating a first thermoplastic sheet to one side of a functional film, laminating a second thermoplastic sheet to a second side of the functional film, and affixing either the first thermoplastic sheet or the second thermoplastic sheet to the power portion, with the other of the first or second thermoplastic sheets being open to atmosphere.
Abstract:
Disclosed is a process to rapidly spin-apply an AR coating system to a backside of a prescription lens. The AR coating system comprises a polyurethane primer layer, a siloxane thermally cured scratch resistant coating layer, a two-layer sol-gel AR coating, and a hydrophobic layer. The process comprising steps of spin-applying each of the layers provides a quick way to furnish a prescription lens that is AR coated on both sides.
Abstract:
A photochromic polyurethane film of improved light fatigue resistance is disclosed. A stabilizer system combining two hindered amine light stabilizers and one phenolic antioxidant is incorporated in the photochromic polyurethane film in an amount so that the film will have more than 40% of light fatigue improvement and less than 6 units in nullb* of CIELAB system after a given light fatigue test. The film can be conveniently laminated between two transparent plastic sheets and incorporated into a plastic article.
Abstract:
A method provides high-vacuum vapor coating methods, with the methods producing novel coating compositions with surprisingly increased performance levels over coatings produced from the same materials under different processing conditions. Compounds of the general formulae II, III and IV, defined herein, can be applied by vapor deposition from a merely compacted, rather than fused or sintered porous matrix source with improved performance, even where the same chemicals are used in the coating, at the same coating temperatures. The generally useful materials include silanes and siloxanes, and siloxazanes of various formulae I, II, III and IV.