Multiphoton fluorescence filters
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United States of America Patent
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Aug 13, 2013
Grant Date -
Apr 21, 2011
app pub date -
Jul 19, 2010
filing date -
May 12, 2006
priority date (Note) -
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Abstract
An optical filter is provided which includes a plurality of hard coating layers of alternating high and low refractive index provided on a substrate and has an associated first transmission band. The filter also includes at least one additional plurality of hard coating layers including high and low refractive index layers and Herpin equivalent layers sandwiched therebetween. The additional plurality of layers has an associated second transmission band that substantially coincides with the first transmission band, but provides additional blocking at wavelengths outside the first transmission band. Relatively wide transmission bands and high blocking over an extended range of wavelengths can be achieved such that the filter is suitable for use in multiphoton fluorescence systems.
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