Category : Spectroscopy, colorimetry, photometry, fluometry > Spectroscopy

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Specular Reflectance is a technique for analyzing transparent films which usually yield weak spectra by ordinary transmission techniques. Applications include surface coatings on reflecting substrates; film thickness measurements by interference fringes and reflectivity coefficient determinations of metals. The application is the determining factor when deciding which angle of incidence should be selected. A 30 degree angle of incidence is normally chosen for more routine samples which have coating thicknesses in the micrometer range. For very thin coatings in the nanometer thickness range, an 80 degree angle of incidence would be appropriate. When sample thickness is unknown, the full range of specular reflectance analysis can be performed conveniently with the VeeMax II, Variable Angle 30 - 85 degree accessory. Simply move the sliding lever on the graduated scale to the desired angle. Each accessory provides a reference mirror to permit the operator to acquire a background spectrum. Their designs eliminate stray light and ensure minimum energy loss. Sensitivity can be further enhanced with the use of a wire grid polarizer.

The order details provide for an 80 degree Specular Reflectance accessory only. The 30 degree and Variable Angle Specular accessories remain as options and can be ordered separately.

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- ARK Horizontal ATR designed for for reflectance analysis
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List of all articles in this sub-category Spectroscopy

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