METHOD OF PRODUCING OPTICAL LENSES Russian patent published in 1995 - IPC

FIELD: optical lenses production. SUBSTANCE: Si or Ge single-crystal wafers are used, cut in perpendicular to the third or to the fourth order crystallographic axes. The wafers are subjected to deformation at constant speed which is no higher than 2·10^-2 mm/s. Wafers are deformed in array, which has working surface to be formed by rotation of the curve, which has two conjugate arcs. Radiuses of the arcs of the circles equal to R_bl and r_m. Values of the radiuses are determined from the relations , and h ≅ h_max≅ R, where R is radius of hemispheric punch, Z is radius of initial blank, δ is thickness of the blank, h_max is depth of the matrix, h is preset sag of blank or lens. EFFECT: improved efficiency. 1 tbl