Thales

Bertrand Forestier

Ludovic Perruchot

Pascal Rousseau

Paul Jougla

Etienne Payot

Bruno Bustin

Arnaud Beche

Grégoire Mechain

Xavier Normandin

An omnidirectional optronic system includes two axes of rotation, a carrier axis and a carried axis, that are perpendicular to each other, for an aircraft targeting pod, having an imaging channel and a laser channel, the laser channel at the point of injection at the entrance of the system and the imaging channel being concentric with the carrier axis, then split and emitted out in parallel.

Omnidirectional optronic system having two rotation axes

A passive IR imaging system with a matrix-array detector in a cryostat includes a cold diaphragm, an image-forming device, of focal length that is continuously variable between Fand Fwith, in this range of focal lengths, a constant numerical aperture and an aperture diaphragm level with the cold diaphragm, comprising a head group of fixed position and constant focal length with at least one lens in a mechanical holding means by the PC configuration, a first group and second group that are movable and positioned in order to ensure the change of focal length between and the focus of the image, an image-transport group of fixed position and of constant magnification, able to image the aperture diaphragm in order to limit the diameter of the PC useful beams on the lenses of the head group. The device comprises a TPC configuration with the first and second movable groups positioned to obtain the focal length F, and its aperture diaphragm embodied in the mechanical holding means.

IR imaging system with continuous GC-PC zoom provided with a TPC configuration

A panoramic device for detection of laser pulses is provided, sensitive to at least two wavelengths and including a plurality of optical channels and a set of linear sensor arrays, each linear sensor array including a photosensitive area. Each optical channel includes at least two linear sensor arrays, the respective photosensitive areas of said at least two linear sensor arrays being non-contiguous, so that said at least two linear sensor arrays of each optical channel observe non-contiguous angular fields. Moreover, the optical channels are optically juxtaposed to obtain a continuous angular field of surveillance.

Panoramic device for detection of laser pulses

A spectral splitting component is provided, having two faces, a planar front face comprising a dichroic treatment and a back face. It is intended to be placed downstream of a convergent objective. The back face is convex and forms a cylindrical surface defined by a generatrix of fixed direction moving perpendicularly along a circular arc comprising two ends, the plane passing through these two ends and parallel to the generatrix of the cylindrical surface forming a dihedral with the plane of the front face, the generatrix of the cylindrical surface being parallel to the edge of the dihedral.

Spectral separation component without a visible ghost image

The invention relates to an imaging device which includes a matrix IR detector, a multifocal lens with a focal length ranging from a short focal length to a long focal length, including a front group of lenses, a variator, a compensator and means for positioning the variator and the compensator, the positions of the variator and of the compensator being respectively adapted to the focal length. This device includes a calibration system which comprises a control for the means for positioning the variator in the vicinity of its short focal length position and the compensator upstream of its long focal length position so as to conjugate the plane of the detector with a real object plane located upstream of the front group of lenses, this positioning being called calibration positioning.

Mixed optical device for multifocal imaging and IR calibration

The invention relates to a dual-field (NF and WF) imaging system comprising an optronic detector () and an optical combination of narrow-field focal length Fhaving, an optical axis a front lens, a narrow-field entrance pupil situated in the vicinity of the front lens, a real wide-field entrance pupil, that is to say situated upstream of the front lens, an intermediate focal plane (IFP). The optical combination has, on the optical axis, the following refractive groups: a convergent front group Gof focal length F, where F&#x3c;F/2, this group Gcomprising the front lens, a divergent field-change group Gthat can move along the optical axis, this group being situated upstream of the IFP in NF configuration and downstream of the IFP in WF configuration, a relay group Gimaging the IFP on the focal plane of the detector. The imaging system has a cooled IR2/IR3 detector and since the refractive groups have lenses, at least three different materials including CaFare used for the lenses of the front group G

Growing community of inventors

Paris, France

Bertrand Forestier