Thomson-csf

Michele Brevignon

Michel Lacombat

Georges Dubroeucq

Marc Turpin

Dominique Rojas

Disclosed is a shift sensor with birefringent optic fiber, wherein two fixed coupling points are provided. One movable coupling point, created by a coupling means, for which it is sought to measure the shift gets shifted over the fiber. A source emits a plane polarized wave along a neutral axis of the fiber. A coupled wave train is created at each coupling point. These coupled wave trains have a propagation speed which is smaller than that of the primary wave train. A detector enables the locating of the relative positions of the coupled wave trains and, hence, of the movable coupling point with reference to the fixed coupling points.

Shift sensor with optic fiber

An illuminator for supplying a divergent illuminating beam from an area of predetermined energy distribution and dimensions comprising a coherent source whose image is formed in a plane by imaging means incorporating electrically controlled optical scanning means making it possible to displace the image in the said area in accordance with a predetermined law.

Illuminator for supplying a divergent illuminating beam from a

Illuminating device comprising a laser source providing a coherent beam with gaussian distribution of intensity and means for separating the initial beam into four parts along two orthogonal directions, means for recombining the four parts resulting in their partial superimposition in a predetermined plane and means for averaging the interferences produced in the plane by the four parts.

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Paris, France

Michele Brevignon