Optical element and moisture-proof coating method thereof
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United States of America Patent
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Aug 11, 2009
Grant Date -
Oct 11, 2007
app pub date -
Jan 30, 2007
filing date -
Jan 31, 2006
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Abstract
An optical element includes glass substrates adhered to surfaces of a birefringent material film through an adhesive. The optical element has a coating for moisture-proof. The moisture-proof treatment is performed by applying a mixed solution of a soluble fluorine resin and an ethylenic compound to end surfaces of the glass substrates and the birefringent material film. Otherwise, the optical element is dipped in a solution prepared by mixing a soluble fluorine resin and an ethylenic compound in a predetermined mixing ratio, so as to moisture-proof the end surfaces of the glass substrates and the birefringent material film. The birefringent material film is a phase difference film. The soluble fluorine resin is an amorphous fluorine resin. The ethylenic compound is PTFE.
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