Societe D'applications Generales

Societe D'applicitons Generales D'electricite Et De Mecanique

Philippe Metivier

Serge Encaoua

A night vision module is adaptable as an input stage on a daylight viewing and aiming device for constituting a system operational during night. It comprises an infra-red imaging unit and a unit for reproducing an image of the field of view of the imaging unit on a screen for display in the input field of the daylight device which has fixed reference marks. The image reproducing unit has a generator for inlaying, in the image of the field, a plurality of marks having a predetermined position with respect to the optical axis of the module, out of the central aiming zone. The inlaid marks are so located as to be centered with respect to the fixed reference marks when the module is harmonized. The module further comprises potentiometers enabling to control the location of the image on the screen and to center the inlaid marks with respect to the reference marks.

Night vision module for a viewing and aiming system

A polychromatic mutual alignment device is suitable for use in an aiming apparatus having a laser delivering a parallel light beam and a plurality of light receivers to be harmonized with the laser. The device comprises an optical mixer having at least two source-forming holes each receiving light delivered in a respective one of a plurality of spectral ranges for which alignment is to be achieved and a plate which is transparent in a wave length range and reflective in another wave range for combining the two light beams into a common mixer output beam; and a parabolic mirror having an axis and placed so as to receive the output beam at an angle with respect to said the axis, the mixer and the mirror being constructed so that all the source-forming holes are at the focal point of the mirror. The mixer further comprises a sensor responsive in the transmission range of the parallel light source and is so constructed that, when the light beam from the parallel light beam source is coaxial with the output beam, the sensor is at the focus of the mirror.

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Poissy, France

Philippe Metivier