Transparent substrate provided with a stack of thin layers
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United States of America Patent
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Mar 28, 2000
Issued Date -
N/A
app pub date -
Jul 31, 1997
filing date -
Aug 12, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
A substrate having the following layers in the following order thereon; first dielectric layer, first layer with infrared reflection properties, second dielectric layer, second layer having infrared reflection properties, and third dielectric layer. The thickness of the first layer with infrared reflection properties is 50% to 64% of that of the second layer having infrared reaction properties. The optical thickness of the first dielectric layer is greater than the thickness of the third dielectric layer by at least 100%. The substrate and the layers together exhibit an external reflection color in the range of blue to blue-green at both 0.degree. and 60.degree. incidence angles.
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