Holmium oxide glasses as calibration standards for near infrared moisture sensors

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United States of America Patent

PATENT NO 9891164
SERIAL NO

14836959

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Abstract

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Near infrared moisture sensors using stable holmium oxide glass calibration standards that simulate different moistures levels in paper obviates problems associated with glass encased paper samples. Holmium oxide glass has a strong absorption at 1.93 microns which is close to absorption by paper. Standards can have varying thicknesses to simulate different moisture levels. Didymium glass can also be used with holmium oxide glass. The moisture sensor operates at reference and measurement infrared regions of 1.94 microns and 1.8 microns, respectively.

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Patent Owner(s)

Patent OwnerAddress
HONEYWELL LIMITED3333 UNITY DRIVE MISSISSAUGA ONTARIO L5L 3S6

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tixier, Sebastien North Vancouver, CA 42 297

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