Scotopic afer-glow lamp

Details Scotopic afer-glow lamp Scotopic afer-glow lamp

H - Electricity

01

J

H01J 61/42 (2006.01)

Patent

CA 2419903

A scotopic after-glow lamp for maximizing an eye's ability to see under low light conditions is provided. The scotopic after-glow lamp comprises a non-uniform scotopic phosphor blend of scotopic enhanced phosphors and after-glow phosphors. A method for constructing a scotopic after-glow lamp for use in an electric lamp is also provided. The method comprises combining scotopic enhanced phosphors with after-glow phosphors and layering the combined phosphors on the lamp wall with at least a portion of the after- glow phosphors being against the lamp wall and at least a portion of the scotopic phosphors being exposed to the electric arc of the lamp. Protective layers, such as aluminum oxide powder, can be added in conjunction with the coating process to reduce the flaking and/or separation of the phosphors from the glass wall of the lamp and each other and enhance and lengthen the useful light production of the lamp as it ages.

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