How does a Fresnel lens improve image

The optical principle of the fresnel was invented by the french physicist Augustin Jean Fresnel as a measure of reducing the huge bulky lenses required for lighthouses.

The basic principle is based on the fact that it is the curved and angled part of the lens which bend the light and by splitting the lens elements into sections a much smaller, lightweight and cheaper lens could be made.

By inducing this principle in the optical rear projection screen, it is possible to control the light rays from the projector in such a way that they are all directed to go perpendicular out from the screen although entering the screen in different angles.

The fresnel lens on an optical rear projection screen consists of thousands of concentric lens element rings, each having a different and specific angle or curvature to bend the light.

Basicly, the Fresnel in VisionScreens ensures a perfect light distribution with an even luminance from the screen. In order to convert the light rays to an image the Fresnel screen also needs a diffusion layer, which is embedded in VisionScreens by a special casting tecnique.