Coloring matter absorbing near-infrared ray and filter for cutting off near-infrared ray
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United States of America Patent
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Apr 28, 2009
Grant Date -
Apr 6, 2006
app pub date -
Nov 18, 2003
filing date -
Nov 22, 2002
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Abstract
A coloring matter absorbing a near-infrared ray which comprises a diimonium salt containing a sulfonimide as an anion moiety, represented by the general formula (1):may be the same or different and each represent a fluoroalkyl group, or together form a fluoroalkylene group.The coloring matter absorbing a near-infrared ray is excellent in the resistance to heat and moisture, and thus exhibits an ability of absorbing a near-infrared ray not lowering for a long period of time. A filter for cutting off a near-infrared ray manufactured by using the coloring matter can be advantageously used for wide applications such as a plasma display panel, an optical lens, a glass for an automobile, and a glass for a building material, due to its excellent resistance to heat and moisture.
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