Multilayer optical film having overlapping harmonics
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United States of America Patent
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Nov 21, 2017
Grant Date -
Apr 21, 2016
app pub date -
Oct 17, 2014
filing date -
Oct 17, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A multilayer optical film including a stack of microlayers arranged into optical repeat units. At a design angle of incidence, such as normal incidence, the stack provides a 1st order reflection band, a 2nd order reflection band, and optionally a 3rd order reflection band. The 2nd order reflection band substantially overlaps the 1st and/or 3rd order reflection bands to form a single wide reflection band. The wide reflection band may cover at least a portion of visible and infrared wavelengths. The multilayer optical film may include an additional optical layer which maybe be an anti-glare layer and/or may be an absorbing layer. The multilayer optical film is suitable for use as a window film.
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