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Barr Associates is the world's largest independent manufacturer of precision thin film coatings and optical filters.
barrassociates.com - 2009-04-08
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Spectrogon manufactures and develops optical filters, optical coatings and holographic diffraction gratings
al mirrors  aluminium mirrors  au mirrors  bbar coatings  broad bandpass filters  longwave pass filters  mulitlayer filters  shortwave pass filters  Spectrogon  stock filters  surface mirrors  vcoating  vis filters  wide bandpass filters 
www.spectrogon.com - 2009-02-06
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raman filters
optical coatings
thin film coatings
optical pigments
optical communications
diplexers
infrared filters
bandpass filters
interference filters
fluorescence filters
dichroic filters
filters
custom optics
notch filters
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