New Primary Standard for Specular Gloss Measurements
نویسنده
چکیده
A new primary specular gloss standard has been developed at the National Institute of Standards and Technology to overcome the disadvantages of black glass. This new standard is a high-purity BaK50 glass with good mechanical durability and homogeneity. In addition, the index of refraction nD = 1.5677 is close to the value specified for the theoretical standard, and the dispersion characteristics are similar to black glass. INTRODUCTION
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