Video imagery device, especially for a homing unit

DETAILED DESCRIPTION What is claimed is: 1.
A video imagery device comprising a support means for a unit constituted by a receiving optical element for focusing the radiation on an image detector rigidly fixed to a support means, a gyroscopic assembly having two degress of freedom for stabilizing the receiving optic axis, said assembly being constituted by a gimbal suspension provided with two mechanical axes of rotation which pass through its center in order to produce angular displacements in elevation and in azimuth and to cause spatial rotation of the optic axis relatively to a reference axis associated with the support means and terminating at the detector, an optical deviating means for bringing the direction of the optic axis into a position corresponding to the reference axis, said gimbal suspension and said optical deviating means being so determined that the optical deviation path passes through a first mechanical axis of rotation aforesaid and then passes through the second mechanical axis of rotation via the center of the gimbal suspension.
2.
A device according to claim 1, wherein the image-displacement means comprise three mirrors, a first mirror being positioned on a first mechanical axis of rotation in order to reflect the entrance optic axis along said first mechanical axis, a second mirror being located at the center of the gimbal suspension in order to subsequently reflect the optic axis along the second mechanical axis of rotation and a third mirror being located on said second mechanical axis in order to finally reflect the optic axis along the reference axis.
3.
A device according to claim 1, wherein the image-displacement means comprise at least five mirrors in a configuration in which the entrance optic axis and the reference axis coincide at the center of the gimbal suspension, a first mirror on the entrance optic axis being coupled with a second mirror on a first mechanical axis in order to reflect the optic axis along said first mechanical axis, a third mirror at the center of the gimbal suspension being subsequently intended to reflect the optic axis along the second mechanical axis, a fourth mirror on said second mechanical axis being coupled with a fifth mirror on the reference axis in order to finally reflect the optic axis along said reference direction