| 摘要 |
Magneto-optic tachometer comprising a light radiating source (3'), means (4) for polarizing said radiation, a crystal (5) made of magneto-optic material and arranged to be traversed by said polarized radiation, and a magnetic circuit (7, 8) arranged to create within said crystal a magnetic field (B) modulated to a frequency proportional to the speed to be measured. The magnetic circuit is such that said magnetic field has a component (B?y?) perpendicular to the direction of propagation of the light radiation within said crystal.
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