Abstract: The general field of the invention is that of illumination devices compatible with the use of night vision goggles comprising a light intensifier. The device according to the invention comprises a carpet of three types of light-emitting diodes called green diodes, blue diodes and red diodes emitting in three different spectral bands centered respectively on a first wavelength situated in the green, a second wavelength situated in the blue and a third wavelength situated in the red. The device comprises an optical plate disposed above the carpet of diodes, the zones situated above certain of the red diodes comprising an interferential filter whose optical transmission has a cutoff wavelength situated in the red in the vicinity of 630 nanometers, the height of the interferential filter above the diode and the shape of the filter being chosen so as to filter in part the light emitted by the red diode so as to be compatible with the use of night vision goggles.

Abstract: The general field of the invention is that of illumination devices compatible with the use of night vision goggles comprising a light intensifier. The device according to the invention comprises a carpet of three types of light-emitting diodes called green diodes, blue diodes and red diodes emitting in three different spectral bands centred respectively on a first wavelength situated in the green, a second wavelength situated in the blue and a third wavelength situated in the red. The device comprises an optical plate disposed above the carpet of diodes, the zones situated above certain of the red diodes comprising an interferential filter whose optical transmission has a cutoff wavelength situated in the red in the vicinity of 630 nanometres, the height of the interferential filter above the diode and the shape of the filter being chosen so as to filter in part the light emitted by the red diode so as to be compatible with the use of night vision goggles.

Abstract: The invention relates to devices for processing images making it possible to identify, to process and to select discrete light sources present in a video image composed of pixels. The aim is the presentation, in real time, to a user of a processed image allowing better recognition of light sources in a weakly contrasted image. In aeronautical use, this device affords a landing aid by allowing better recognition of runway lamps in conditions of degraded visibility, in particular in foggy weather. The invention relies on three major principles: 1) the main processing of images is performed only on a small number of pixels whose level is greater than a threshold; 2) a likelihood estimator evaluates the probability of existence of sources in the image; 3) the threshold is variable as a function of a certain number of parameters of the image.

Abstract: The invention relates to devices for processing images making it possible to identify, to process and to select discrete light sources present in a video image composed of pixels. The aim is the presentation, in real time, to a user of a processed image allowing better recognition of light sources in a weakly contrasted image. In aeronautical use, this device affords a landing aid by allowing better recognition of runway lamps in conditions of degraded visibility, in particular in foggy weather. The invention relies on three major principles: 1) the main processing of images is performed only on a small number of pixels whose level is greater than a threshold; 2) a likelihood estimator evaluates the probability of existence of sources in the image; 3) the threshold is variable as a function of a certain number of parameters of the image.

Abstract: The invention relates to an electronic correction device for correcting the optical distortions of an optic for collimating and superposing a collimated view in the case where the display is of matrix type. The principle of the invention is to carry out these corrections at the level of the display by associating with each pixel of the display the same number of pixels of each source-image to be displayed, the addresses of the pixels of the source-images being computed from the addresses of the pixels of the display by applying the distortion function for the optic to them.