Effect of Sandblasting on the Specular Reflection from Encoder Wheels
Manufacturers of encoder wheels need to be able to evaluate the raw materials and quality parameters at-line and in real time in order to improve their own processing techniques and to make better quality products. Because of this, they often use spectral reflectance measurements on their materials to learn more about what they’re comprised of. However, the process of sandblasting is often used in preparing machines parts, and in some cases can lessen the specular reflection of metals and plastics. This application note describes a feasibility study in which the reflectivity of metal and plastic encoder wheels was measured before and after sandblasting.
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