AN OPTICAL FILTER

摘要

The optical filter comprises an optically active layer, and a protective layer on both sides, where one of the protective layers is an unstretched polyamide protective layer poured of a solution. The polyamide protective layer is formed as polyamide cast film with a thickness of 40-180 mu m. The optical filter has two polyamide protective layers. The optical filter has no adhesion-mediator layer between the polyamide protective layer and the optically active layer, and is provided with a coating on one or both sides. The polyamide protective layer consists of optional additives. The optical filter comprises an optically active layer, and a protective layer on both sides, where one of the protective layers is an unstretched polyamide protective layer poured of a solution. The polyamide protective layer is formed as polyamide cast film with a thickness of 40-180 mu m. The optical filter has two polyamide protective layers. The optical filter has no adhesion-mediator layer between the polyamide protective layer and the optically active layer, and is provided with a coating on one or both sides. The polyamide protective layer consists of optional additives, which comprise inorganic and organic stabilizers, heat stabilizers, light stabilizers, ultra-violet stabilizers, ultra-violet absorbers, ultra-violet blockers, infrared absorbers, near-infrared absorbers, antioxidants, antiozonants, nucleating agents, crystallization inhibitors, mold-release agents, lubricants, anti-blocking agent, separating agents, organic and inorganic pigments, dyes, condensation catalysts, chain regulator, defoamer, chain-extending additives, plasticizers, photochromic additives, unmodified and modified, natural and synthetic phyllosilicates and optical brighteners. Optical thin layers, optical thin films and/or further optical filter are applied on the coating and/or on the polyamide protective layer. The optical thin layers or optical thin films comprise anti-reflex coatings, decorative coatings, blooming coatings, anti-reflection coatings, mirror coating, hard coats and anti-fog coatings.