Abstract:
The invention concerns a spectral separation component (10) with two faces, a planar front face (11) comprising a dichroic treatment and a rear face (12'). It is intended to be placed downstream from a convergent lens. The rear face (12') has a convex cylindrical surface defined by a generatrix having a set direction that moves perpendicular along an arc of a circle (12) comprising two ends, the plane (13') passing through these two ends and parallel to the generatrix of the cylindrical surface forming a dihedron with the plane of the front face (11), the generatrix of the cylindrical surface being parallel to the apex (14') of the dihedron.
Abstract:
The invention concerns an IR passive imagery system (200) including: an IR matrix detector (10), - a two-field optical device, capable of forming an image on the detector and including image formation methods on an optical axis (20'), a removable afocal (30) of determined G magnification placed upstream of the image formation methods, an aperture diaphragm (40) placed between the detector and the image formation methods. It includes scanning methods (70') in the directional angle of the detective assembly and two-field optical device, since the aperture diaphragm (40) is removable and the optical device includes, in addition, a blockable backflushing mirror (81), arranged upstream of the image formation methods, and the image formation methods include methods for obtaining a third field, the backflushing mirror (81) and the methods for obtaining a third field being arranged on said optical axis and capable of forming an image on said detector (10) with the goal of obtaining a three-field imaging system.
Abstract:
The invention relates to an imaging device (100) that comprises a matrix IR detector (40), a multifocal lens with a focal length ranging from a short focal length to a long focal length, and comprising a front group of lenses (G1), a variator (10), a compensator (20), and a means for positioning the variator and the compensator, the position of the variator and the compensator being respectively adapted to the focal length. The device includes a calibration system that comprises a control for the means for positioning the variator (10) in the vicinity of the short focal position thereof and for positioning the compensator (20) upstream from the long focal position thereof in order to conjugate the plane of the detector (40) with a real object plane located upstream from the front group of lenses (G1), said positioning being called calibration positioning.
Abstract:
The invention relates to a dual-field (SF and LF) imaging system including an optronic detector (1) and an optical combination of small field focalisation (Fpc) comprising on an optical axis: a head lens; a small-field inlet pupil in the vicinity of the head lens; a real large-field inlet pupil, i.e. provided upstream the head lens; an intermediate focal plane (IFP); the optical combination further comprising on the optical axis the following dioptric groups: a convergent head group G1 having a focal F, with F
Abstract:
The invention relates to a dual-field (small field and large field) imaging system including an optronic detector (1) and an optical combination of small field focalisation (Fpc) comprising on an optical axis: a head lens (G1); a small-field inlet pupil in the vicinity of the head lens; a real large-field inlet pupil, i.e. provided upstream the head lens; an intermediate focal plane (IFP); the optical combination further comprising on the optical axis the following dioptric groups: a convergent head group G1 having a focal F, with F