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3. Main equipment found in NMIs
In the 360° field, there are three main technologies:
mechanically indexed trays ;
platens equipped with one or more angle encoders;
and finally, turntables based on the principle of laser gyros.
3.1 Indexing trays
Angle plates generate angles by rotating an end solid relative to a fixed solid.
In the field of metrology, the best-known products are Moore trays .
The technology of these...
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Main equipment found in NMIs
Principle of angular sector measurement
Bibliography
Standards and norms
French Standards Association (AFNOR)
- Measuring instruments – Steel brackets. - NF E 11-103 - 1983
- Instruments de mesurage des angles. Généralités. - NF E 11-300 - 1986
- Instruments de mesurage des angles. Niveaux à bulle. - NF E 11-301 - 1984
- Instruments de mesurage des angles. Niveaux électroniques. - NF E 11-302 - 1984
- Instruments de mesurage des angles. Autocollimateurs. - NF...
Directory
Manufacturers – Suppliers – Distributors
AG Davis – AA Gauge (divider plate)
http://www.agdavis-aagage.com/a_rotary_tables.htm
Brown and Sharp TESA (corner shims)
...
Websites
BIPM: Calibration and measurement capabilities: CMCs (Appendix C) http://kcdb.bipm.org/appendixC
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