Abstract: The present invention titled: “Method and apparatus of instrumenting converging and diverging flat lenses by sequential upright and inverted 3-D transparent anvils: pyramidal flat lens” is a transparent flat rectangular or circular with nozzle shaped without the addition of the outer 3-D anvil. The apparatus has a fixed height assembled from sequential 3-D anvils with one anvil adjacent to a reversed one. The 3-D anvils are arranged from the boundary to the center zone with gradual reduced volumes. The volumes of the 3-D anvils result from establishing inclined conjugate planes to the pyramidal planes. The converging and diverging pyramidal flat lenses have the same structure, but with the reverse order of the index of refractions of the filling transparent materials.