Head-up display optical film, head-up display, and vehicle
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United States of America Patent
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Nov 23, 2010
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app pub date -
Nov 26, 2008
filing date -
Nov 26, 2007
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Abstract
A head-up display optical film includes: a first optical layer configured to convert the polarization plane of incident light by 90 degrees; a second optical layer configured to convert the polarization plane of incident light by 90 degrees; and an intermediate optical layer sandwiched between the first optical layer and the second optical layer and having a refractive index that is different from the refractive index of the first optical layer and from the refractive index of the second optical layer.
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