Dyeing method and dyeing apparatus
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United States of America Patent
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Jan 3, 2017
Grant Date -
Jan 27, 2011
app pub date -
Mar 23, 2009
filing date -
Mar 31, 2008
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Abstract
Disclosed is a dyeing method using a laser beam. The method can dye transparent resins such as plastic lens well. Also disclosed is a dyeing apparatus. The dyeing method comprises heating a plastic lens having a dye-coated surface to fix the dye on the surface of the plastic lens. The method comprises the step of applying a laser beam with a wavelength, which is less likely to be absorbed in the dye but it absorbed in the plastic lens, onto the surface of the plastic lens through the dye.
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