LOW MELTING POINT IONIC LIQUIDS FOR INFRA-RED LIQUID LENS DESIGN
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United States of America
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Issued Date -
Mar 31, 2022
app pub date -
Jan 23, 2020
filing date -
Jan 23, 2020
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Abstract
A liquid lens can include a lens body forming a cavity with a conducting liquid and an insulating liquid disposed therein, the conducting liquid substantially immiscible with the insulating liquid to define an interface between the conducting and insulating liquids. The conducting liquid can include an ionic compound of either a dicyanamide anion and a cation counterion, or a tricyanomethanide anion and a cation counterion, the dicyanamide anion having the formula the tricyanomethanide anion having the formula and the cation counterion is one of an imidazolium, a pyrrolidininium, a piperidinium, a phosphonium, a pyridinium, a pyrrolinium or a sulfonium cation. The ionic compound of the conducting liquid can be N-methyl-N-ethylpyrrolidinium dicyanamide, l-ethyl-3-methylimidazolium dicyanamide, 1-butyl-1-methylpyrrolidinium tricyanomethanide, or 1-ethyl-3-methylimidazolium tricyanomethanide, among others. The conducting liquid can have transmittance of at least 50% over a thickness of 1 mm for electromagnetic waves having wavelength of 1550 n.
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