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Holmium oxide glasses as calibration standards for near infrared moisture sensors
Holmium oxide glasses as calibration standards for near infrared moisture sensors
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机译:氧化oxide玻璃作为近红外湿度传感器的校准标准
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摘要
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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