| Figure 2 — Some prototype artifacts and scans.
a. 203 mm diameter sphere. The bottom two images show the point clouds and best-fit spheres from two different instruments.
b. Slotted disc artifact. Images on the right show the front, oblique, and side views of the point clouds from two different instruments.
c. Stair artifact. Images on the right show oblique and side views of the point clouds from two different instruments.
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