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Assignee3M Innovative Properties Company
InventorsKristina M. Magnusson, Kenneth Jarefors, Laurent Froissard, Britton G. Billingsley
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A curved eye protection shield for welding protection. The eye protection shield has an electrically switchable darkening filter and a protective cover. The darkening filter has eye facing major inner and outer surfaces, and the protective cover has major inner and outer surfaces. The protective cover is provided for arrangement on the inner surface of the darkening filter. The inner and outer surface of the darkening filter are equidistant, whereas the inner and outer surface of the protective cover are non-equidistant. The invention is advantageous in that it provides an eye protection shield having a minimized refractive power.
A curved eye protection shield for welding protection, comprising an electrically switchable darkening filter and a protective cover, wherein the protective cover is removably attached to the darkening filter, the darkening filter having a refractive power, an eye facing major inner surface and, opposite thereof, a major outer surface, and the protective cover having a major inner surface and, opposite thereof, further a major outer surface, wherein one of the inner and outer surface of the protective cover faces the respective outer or inner surface of the darkening filter, and wherein the inner and outer surface of the protective cover are shaped to compensate for the refractive power of the darkening filter.
Dependencies are inferred from the claim text.