80Spec Specular Reflectance

80° Spec Specular Reflectance Accessory

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° 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° 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 III Variable Angle 30 - 85° 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 either a manual rotating wire grid polarizer or a automated wire grid polarizer.

The order details below provide for an 80° Specular Reflectance accessory only. The 30°, 45° Fixed Angle Specular and Variable Angle Specular accessories can be ordered separately.