Illumination means for 3-D printing apparatus

Claim 1

In apparatus for printing stereoscopic picture of the type including a multiplicity of image bands, each of said image band comprising a plurality N of condensed image segments from a corresponding plurality N of two-dimensional views of an object field taken from spaced vantage points, and a lenticular print film having a corresponding multiplicity of lenticules aligned with the image bands, said apparatus comprising a projecting lens with a light gate in registry therewith, film holder means for positioning sequentially negatives in a negative film strip series containing said N two-dimensional views in said light gate, means for moving said lens at a preselected speed in a direction for projecting respective negatives from a corresponding plurality N of projecting lens locations with the projected image of a selected element of each negative in substantial registry with a reference point, and for stopping said lens at each said lens location for positioning a successive negative in said series in said light gate, and illumination means movable along a predetermined path for exposing at each lens location the respective negative in said light gate for projecting the negative onto a segment of an image band of the print film, the improvement wherein said illumination means comprises a tiltable lamphouse for directing illumination through a negative in said light gate and said lens onto the print film, and control means for tilting said lamphouse at predetermined varying angles that vary proportionately with the distance of said lamphouse from the center of scan of said print film.