Measuring sphericity on a roundness gage
Abstract
The three dimensional geometry of a spherical object may be determined by evaluation of a number of two dimensional roundness measurements which have a known orientation with respect to one another. A suitable set of orientations appears to be one in which the plane of each roundness measurement coincides with every other such plane along a single diameter of the sphere. A device for producing the required set of orientations, adaptable to spheres of varying diameters and designed to avoid damage to delicate materials, was developed and tested.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- 1980
- Bibcode:
- 1980STIN...8126436G
- Keywords:
-
- Geometry;
- Measurement;
- Spheres;
- Topography;
- Measuring Instruments;
- Surface Roughness;
- Instrumentation and Photography