The present invention relates to a collimated relief display device and may be applied in aeronautics to a head down or head up display.
A collimated relief display device includes, in a way known per se, a light image generator and an optical collimation system in the focal plane of which the light image is situated for projecting it to infinity. The generators usually used are either cathode ray tubes, or liquid crystal image forming devices. In the case of a cathode ray tube, the image may be produced by haphazard scanning (random scanning) or by television scanning (line by line scanning); in the case of liquid crystals, the image corresponds to the distribution in an X and Y matrix of points or pixels.
It is further known to use micro-lenses for giving the impression of images with moving subjects. For that, a lattice of micro-lenses is disposed above a plurality of flat images cut into strips and juxtaposed in the focal planes of the microlenses. By rotating the object thus equipped in front of his eyes, the observer may see successively the different images which reproduce a scene with moving subjects.
The purpose of the invention is to produce a relief impression of the collimated image by forming two monochrome images intended to be seen respectively by the right eye and by the left eye.