Page 467 - The ROV Manual - A User Guide for Remotely Operated Vehicles 2nd edition

(a)
Light source
(b)
FIGURE 17.6
1
1
ω
L a s e r s
Sampler
17.2 Gyros 461
Corner mirror
RLG principle of operation with (a) outside or (b) inline light source.
Figure 17.8, a light source is generated in opposing directions around a coil of fiber. As with the RLG, the beams of light are rejoined and then merged onto a sensor for pattern matching (i.e., rota- tional measurement). In Figure 17.8, ω is the rotational velocity while Δφ is the phase difference
FIGURE 17.7
Triangular RLG.
Half– silvered mirror