Patent ID: 8348440

Claim:
A vision system for displaying synthetically generated images for stimulating night vision devices, in particular used in training simulators for the driving and flight control training, as well as for reconnaissance and observations operations under night vision conditions, said system comprising: at least one image generator for generating image signals of a synthetic image, at least one projector to which the image signals are fed for projecting the image onto at least one projection screen further comprising a night vision device for viewing the projected image, wherein the at least one projector is provided with a laser source generating a laser projection beam and emitting laser light with a wavelength (λ) in an invisible spectral range and within the spectral sensitivity of the night vision device and wherein image signals are modulated onto the laser light, a second image generator for generating image signals of a second synthetic image that are in color and visible, a second projector to which the image signals for the second synthetic image are fed for projecting the second image onto the projection screen, the two images being independent from each other and projected simulataneously and superimposed, characterized in that a narrow-band interference filter that is adapted to the wavelength (λ) of the light from the laser source is fitted onto the front of the night vision device; and that the band width of the interference filter is adapted to the stability of the laser source and ranges from 10 nm to 30 nm.