Abstract: An illumination system, designed primarily for use in assist in a landing an airplane, includes a collimator that accepts radiation from a set of laser diodes, that may be at different wavelengths. The collimator directs the radiation to a diffusion screen that includes a Fourier dispersion film that results in multiple dispersion angels of the radiation, which is ideally suiting for airplane landing or other uses, such as surveillance. improved optical collection and transmission surface used in the illuminator, includes a plastic mold injection surface including staggered multiple transmission sites each with a recessed portion in which incident light is not lost during reflection towards the propagation surface.

Abstract: An improved optical collection and transmission surface includes a plastic mold injection surface including staggered multiple transmission sites each with a recessed portion in which incident light is not lost during reflection towards the propagation surface. A device implementing the surfaces is plastic-mold injected of high quality acrylic at in a preferred embodiment and can be economically optionally polished or finished to achieve desired quality surfaces.

Abstract: The present invention provides for a portable light diffusion unit that comprises a casing 10, one or more laser diodes 2 and a series of diffusion screens 8. The diode(s) direct a concentrated beam of light 3 at an approximate perpendicular angle to the series of diffusion screens and the diffusion screens diffuse the concentrated beam of light into a diffuse beam of light.