Optical article having a conductive anti-reflection coating
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United States of America Patent
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-
Dec 27, 1983
Grant Date -
N/A
app pub date -
Aug 9, 1982
filing date -
Aug 9, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Optical article having a substrate with first and second surfaces and with a conductive antireflection coating disposed on the first surface. The conductive antireflection coating is comprised of at least one layer of a low index material carried by said first surface and a thin transparent conducting layer of a material having a high index of refraction carried by the layer of material having a low index of refraction. The conducting layer provides an exposed surface to which the direct electrical contact can be made. The conducting layer has an optical thickness ranging from 1.0 to 30.0 nanometers. The layer of material having a low index of refraction has its design thickness reduced to compensate for the thickness of the conducting layer whereby the conducting layer does not seriously degrade the optical performance of the coating over that which could be obtained without the use of the conducting layer.
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