Illuminating apparatus for straight line propagation of light

Claim 1

In combination with a vehicle headlamp, apparatus for projecting and directing light from the headlamp to a selected area removed therefrom, comprising: a plurality of light filters, each spaced from one another, and a housing; means forming an outlet in said housing for passage of light therethrough; means mounting said filters within said housing with said headlamp being spaced from said filters so as to enable at least part of the light to travel from said headlamp, through said filters, and through said outlet; said filters each including a grid; said grid being comprised of a multiplicity of cells; each cell being in the form of a passageway which forms a tunnel through which light can pass; each cell being defined by an inner edge portion, an outer edge portion, and a side wall with said inner edge portion being disposed adjacent to said headlamp and with said outer edge portion being disposed adjacent to said outlet and with said side wall connecting said inner edge portion to said outer edge portion; said inner edge portion of each cell wall being smaller in cross sectional area relative to said outer edge portion to cause said side wall to diverge in thickness in a direction away from said inner edge portion thereby enabling a substantially undiffused beam of light to be emitted from the outlet; the cells in adjacent filters being progressively larger in horizontal width in a direction away from the headlamp, so that the light from the headlamp is spread more in a horizontal direction as compared to a vertical direction.