Photochromic plate containing melanin
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United States of America Patent
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Issued Date -
Jan 13, 2005
app pub date -
May 19, 2004
filing date -
May 19, 2003
priority date (Note) -
Abandoned
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Abstract
A photochromic melanin-containing optical plate is described. The plate has a lamination structure comprising one or two functional film layers containing photochromic compounds and melanin pigments. The photochromic melanin-containing optical plate absorbs high-energy visible-light while indoor and darkens to a sunscreen while outdoors. The plate can be advantageously used in eyewear optical articles such as ski goggles, sunscreen lenses, eyewear lenses, etc.
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