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I would like to estimate particle sizes on a D9000 using TESPA probes. One problem we are running into is what portion of the image is due to the tip alone.
Does anyone have an idea how this might get accomplished? I am thinking of measuring either a pillar of known size or a contact. This would allow me to at least know tip change delta's and or Tip to Tip differences.
Hi Eric -
How far up from the apex of the probe do you need to measure? How much actual shape information do you need? If it is just a general sharpness criteria, you can use something light HSG and then monitor the roughness. Once the roughness has dropped below a certain threshold, you can consider the tip "worn".