Electrically-conductive, contrast-selectable, contrast-improving

Details Electrically-conductive, contrast-selectable, contrast-improving Electrically-conductive, contrast-selectable, contrast-improving

1994-07-07

1996-05-28

Dzierzynski, Paul M.

Optical: systems and elements

Absorption filter

359585, 359586, 359588, 359359, 359360, 427166, G02B 522, G02B 110, F21V 904, B05D 506

Patent

active

055217656

ABSTRACT:
The present invention comprises a contrast-improving 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. Additionally, 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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patent: 5344718 (1994-09-01), Hartig et al.
patent: 5377045 (1994-12-01), Wolfe et al.
Thornton, John A., et al.; "Internal Stresses in Metallic Films Deposited by Cylindrical Magnetron Sputtering"; Thin Solid Films, 64; 1979; pp. 111-119.
Belkind, A., et al.; "Reactive co-sputtering of oxides and nitrides using a C-mag.TM. rotatable cylindrical cathode"; Surface and Coatings Technology, 49; 1991; pp. 155-160.
Wolfe, Jess, et al.; "Durable Sputtered Low Emissivity Coatings"; 2nd Coating Technology Symposium; undated; pp. 11:1-11:17.

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