Near infrared spectroscopy is a viable alternative to density and dynamic behavior techniques as a method for sorting paper in recycling operations. Moisture and crystallinity are among the criteria that can be used to differentiate a mixed stream of paper. (more…)

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Background

Our customer supplied us with three laser crystals for this feasibility study. Those crystals, labeled QC08_Rectangular, QC-9_Rectangular and QC09_Cylindrical are shown in Figure 1. The objective of this test was to perform absorbance measurements over 200-1000 nm. Laser crystals are typically used as a gain media for solid-state lasers. (more…)

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