COLLIMATED VISUAL DISPLAY SYSTEM
FIG4 is a schematic view of the optical layout showing the uniform resolution according to the present invention
The shape of the back-projection screen 23 is obtained in such a way that the parallel rays from the two eyes of a person in the design eye point of the visual display system, after reflection on the spherical mirror 22, converge on the back-projection screen 23 surface, as illustrated with the arrows on FIG4. This ensures the collimation property of the visual system. The shape of the back-projection screen is preferably optimized for providing a collimated beam to a pilot and a co-pilot. This mapping is further also illustrated on FIG4, which shows the mapping of the projector 24 pixels onto the back-projection screen 23 by the freeform mirror 25. It also illustrates the mapping of the eyes of the viewer 21 in the design eye point on the back-projection screen 23 by the collimating mirror 22.
schematic view
24
projector
22
mirror
4
projectors
25
freeform mirror
21
cockpit viewer
23
screen
['1. A collimated visual display system comprising - a back-projection screen, - a spherical mirror reflecting an image on the back-projection screen to be viewed by a viewer located in the design eye point, - wherein the back-projection screen is configured to provide a collimated beam to a viewer located in the design eye point,  characterized in that - a single projector illuminates the back-projection screen to provide the image on the back-projection screen, - a freeform mirror located between the back-projection screen and the projector is configured to map all the pixels of the projector to the back-projection screen such that the resolution of the projector is sufficiently uniform on the back-projection screen.']