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INVENTORS: Swainson; Wyn Kelly (P.O. Box 4262, Berkeley, CA 94704) .
U.S. CLASS: 365/119; 345/139; 348/164; 358/302
ABSTRACT: Method, apparatus and product in which a three-dimensional figure is formed in situ in a medium having two active components by causing two radiation beams to intersect in the media. The dissimilar components are selected to respond to the simultaneous presence of the beam and to either react or to produce reactants which render the intersection of the beams physically sensible or distinguishable. The beams trace surface elements of the figure to be produced. XX
