Optical coatings and methods
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United States of America Patent
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Issued Date -
May 12, 2005
app pub date -
Nov 5, 2004
filing date -
Nov 5, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An optical coating formed by alternating high index and low index layers having one or more thin crystal growth inhibiting layers for inhibiting crystal growth in the high index material or the low index material. The crystal growth inhibiting layers are formed from a material different than the material in the adjacent layers of the coating. The material may be the same as or different from the high index material or low index material. According to one aspect of the invention, the ratio of the indices of refraction of the high index material to the low index material may be increased by the use of materials such as rutile titanium dioxide as the high index material while reducing the scatter by limiting the size of crystals in the material.
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