Flexible plastic substrate with anti-reflection coating having low reflective color and method
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United States of America Patent
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-
Aug 17, 1999
Grant Date -
N/A
app pub date -
May 9, 1995
filing date -
May 9, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical article comprising a flexible plastic substrate having an index of refraction ranging from 1.55 to 1.71 and having first and second surfaces and an anti-reflection coating carried by the first surface. The anti-reflection coating consists of a high index material and a low index material in which the high index material has an index of refraction of 2.0 and greater to provide the index of refraction difference between the substrate and the high index material of 0.29 to 0.75. The low index material is formed of a material having an index of refraction of 1.38 or less to provide an index of refraction difference between the high index material to the low index material ranging from approximately 0.59 to 0.92.
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