Polymeric optical film
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United States of America Patent
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Aug 29, 2006
Issued Date -
N/A
app pub date -
Jan 29, 2004
filing date -
Feb 12, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical film includes a layer of simultaneous biaxially stretched polyolefin film that is substantially non-absorbing and non-scattering for at least one polarization state of visible light. The layer has x, y, and z orthogonal indices of refraction where at least two of the orthogonal indices of refraction are not equal. The layer has an in-plane retardance of 100 nm or less and an absolute value of an out-of-plane retardance being 55 nm or greater.
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