Warning light

Claim 1

A warning light for indicating the distance from the light by a visual signal which changes color as the distance between the light and the viewer changes, said warning light comprising a white light source, color grid means having polished external surfaces positioned forward of said light source and on opposite sides of a principal axis for substantially collimating the light rays and for passing selective light rays of different wavelengths, said color grid means comprising a color grid made up of a plurality of vertically oriented strips of different elongations in the direction of the axis for transmitting different colors and which are attached to each other transversely at their bases, each of said different strips transmitting a band of light rays of a specific wavelength and said strips positioned in a selective reoccurring pattern, and optical means on opposite sides of the principal axis for receiving these light rays of different wavelengths and dispersing them in such a pattern as to produce a different color signal at predetermined distances from the warning light, said optIcal means comprising a planoconvex lens which receives the collimated light rays of different wavelengths on its flat surface and directs the light waves through the focal point of the lens to produce a different colored signal at predetermined distances from the warning light due to the divergence of different light rays as they pass through said focal point, said planoconvex lens comprising vertically oriented longitudinally dimensioned planoconvex lens sections.