GERMANIUM MONOCRYSTALS-BASED METHOD FOR PRODUCING SHAPED ARTICLES Russian patent published in 2016 - IPC C30B15/34 C30B29/08 G02B1/02 G02B13/14 

FIELD: optics.

SUBSTANCE: invention relates to technology of producing optical articles made from germanium by growing germanium monocrystals from the melt in the form of shaped articles in the form of convex-concave pieces, which can be used after processing for making the lenses of the infrared range. Germanium monocrystals are grown on the inoculating crystal using a vertical shaping element 1 placed into crucible 2, having holes 6 in the point where its lower part adjoins crucible 2 to remove the excess melt formed during germanium crystallization, horizontal upper and lower shaping elements are placed in the grooves of vertical shaping element 1 with diameter d, said upper and lower shaping elements have central holes, elements 3 of convex-concave shape with diameters, d₁ and d₂, respectively, at that, d₂> d₁> d. Grown monocrystal is shaped as a lens piece due to shaping elements.

EFFECT: invention enables serial producing germanium monocrystals (including large-sized ones) with different section shape with minimum material consumption.

1 cl, 1 dwg, 2 ex