Fiber Optic Gyroscope Market Size, Global SWOT Analysis
Hemisphere & Stem of a Hemispherical Resonator Gyroscope -- donated to the museum @ which this Is displayed by Northrop-Grumman. It might not look like very much; but apparently these hemispherical resonator
Figure 5 from Northrop Grumman's Family of Fiberoptic based Inertial Navigation Systems | Semantic Scholar