Optical: systems and elements – Light interference – Produced by coating or lamina
Patent
1990-10-19
1993-06-01
Arnold, Bruce Y.
Optical: systems and elements
Light interference
Produced by coating or lamina
359585, 359586, 359590, 427166, G02B 110, G02B 528
Patent
active
052165426
ABSTRACT:
A coating, composed of an optically effective layer system for substrates, whereby the layer system has a high antireflective effect. On a front side of the substrate, facing the observer, in sequence from the front side to the observer, a first layer is arranged on the substrate, functioning as dielectric and comprising metal oxide. Thereupon follows a second layer comprising nitride, preferably TiN.sub.x (x is equal to or greater than 1, preferably x=1.05). A third layer follows functioning as dielectric and comprising metal oxide. Thereupon a fourth layer follows comprising nitride, preferably TiN.sub.x (x is equal to or greater than 1, preferably x=1.05). A fifth layer follows functioning as dielectric comprising metal oxide. On a backside of the substrate a TiN.sub.x -layer (x.gtoreq.1, preferably x=1.05) is arranged. The adequate selection of certain materials for the individual layers, of certain layer thicknesses and of a certain sequence of the individual layers results in a surprisingly good antireflective coating, contrast increase and antistatic effect. These good optical features of the layer system are reached with a small number of layers and with thin layer thicknesses. This, in turn, leads to an extremely cost saving manufacturing of the coating.
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Hartig Klaus
Roegels Stephan
Szczyrbowski Joachim
Zmelty Anton
Arnold Bruce Y.
Leybold Aktiengesellschaft
Phan James
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