Coating, composed of an optically effective layer system, for su

Details Coating, composed of an optically effective layer system, for su Coating, composed of an optically effective layer system, for su

1991-06-18

1992-12-08

Lerner, Martin

Optical: systems and elements

Light interference

Produced by coating or lamina

359586, 359588, 427166, G02B 110, B05D 506

Patent

active

051702916

ABSTRACT:
A coating for applying to a front side of a substrate, which side is facing an observer, comprises a four-layer system which is optically effective and has a high anti-reflective effect. A first layer of this system is applied onto the front side of the substrate and is, preferably, a highly-refracting TiO.sub.2 layer, the second layer is applied to the first layer and is a low-refracting Al.sub.2 O.sub.3 layer, a third layer of the system is applied to the second layer and is, preferably, a high-refracting TiO.sub.2, while the fourth layer applied to the third layer is, preferably, a low-refracting SiO.sub.2 layer. The layers can be formed by either a pyrolytic method, a plasma-supported chemical vapor deposition method, a sputtering method or a chemical vapor deposition method. Preferably, they are formed by a DC-reactive sputtering method with a magnetron.

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