Electrically-conductive, contrast-selectable,...

Details Electrically-conductive, contrast-selectable,... Electrically-conductive, contrast-selectable,...

G - Physics

02

B

G02B 5/22 (2006.01) C23C 14/35 (2006.01) G02B 1/11 (2006.01) H01J 29/89 (2006.01)

Patent

CA 2150081

The present invention comprises a contrast-improv- ing filter which uses a tri-layer comprising a metal layer, preferably silver, sandwiched between two metal precoat layers. The silver layer is thin so that it is substantially transparent to visible light. Addition- ally, the contrast-improving filter uses a silicon nitride layer between the tri-layer and further oxide layer to improve the durability and scratch-resistance of the contrast-improving filter.

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