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US07884888B2 Automatic darkening filter with offset polarizers 有权
带偏光偏光镜的自动变暗滤光片

Automatic darkening filter with offset polarizers
Abstract:
A protective automatic darkening filter construction 10 includes two low twist liquid crystal cells 26, 30 interspersed between a series of offset polarizers 24, 28, 32. The resulting construction provides improved homogeneity in the dark state as viewed by the user over a large viewing angle. By reducing variations in shade, visibility through the filter may be improved.
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