Abstract: Device used in aviation for in-flight reception of images corrects distortion resulting from the observation of a field of view through a wall (1) which is transparent in a given spectral band and whose shape distorts the image of the scene formed on a receiver (4). An optical system arranged between the receiver and the wall performs an anamorphotic function in one direction and a deviation function in another direction perpendicular thereto. The deviation function is realized by a single prism formed by two parts (5,6) cemented to one another and which have different refractive indices so as to form an achromatic assembly. The anamorphotic function is obtained by a slight change of the focal length of the receiver in conjunction with the elongation of lines formed by the prism in the direction of the deviation function.

Abstract: A sight comprises an image carrier (D) presenting an exit aperture (P3) and forming, from an observed image (I), an intermediate image (I') at the focus (F) of an ocular comprised of a spherical mirror (M) with the same optical axis (XX') as that of the image carrier (D), with a holographic beam deflection element (H) being placed at the focus (F) of the spherical mirror (M). In accordance with the invention, the intermediate image (I') is formed on the focal surface (S) of the ocular, and the holographic beam deflection element (H) is disposed on a support resting on the focal surface (S) and, in association with the spherical mirror (M), conjugates stigmatically the exit aperture (P3) of the image carrier (D) with the exit aperture (P1) of the sight.